<P> Courtney DiLaurentis: Alison is really Courtney in the books . She used to be sweet, until she started pretending to be her twin, where her personality morphed into her . She is the third child to Jessica and Kenneth and was sent to The Preserve at Addison - Stevens after a physical argument with Alison who she eventually turned into and befriended the Liars up until the night of her infamous disappearance when she was killed and buried by the real Alison DiLaurentis and her accomplice Nick Maxwell . </P> <P> A: A is the main antagonist of the series, being, for the most part, an anonymous character who relentlessly torments many characters, in particular the Liars . Mona Vanderwaal, Alison DiLaurentis and Nick Maxwell are discovered to be A. Mona became A due to Alison and the Liars being responsible for The Jenna Thing, which burned her too . However, she is killed when Spencer pushes her off a cliff face and her neck is caught between rocks . However, a new "A" rises, this time even more determined to hurt the Liars . This A is revealed to be Alison herself who wanted revenge on the Liars for ruining her life and Nick, who is revealed to be her accomplice . </P> <Table> <Tr> <Th> Book #</Th> <Th> Title </Th> <Th> Publication Date </Th> <Th> ISBN </Th> <Th> Pages </Th> </Tr> <Tr> <Td_colspan="6"> </Td> </Tr> <Tr> <Td> </Td> <Td> Pretty Little Liars </Td> <Td> October 3, 2006 </Td> <Td> 978 - 0 - 06 - 088730 - 8 </Td> <Td> 304 </Td> </Tr> <Tr> <Td_colspan="6"> The story introduces an exclusive group of friends: Alison DiLaurentis, the popular yet manipulative queen bee; Aria Montgomery, an independent girl who is considered to be the oddball in Rosewood who also went to Iceland for the summer; Emily Fields, a swimmer who holds secret feelings for Alison; Hanna Marin, who strives to be thin and popular like Alison; and Spencer Hastings, an overachiever who is brave enough to stand up against Alison's manipulative ways . Alison mysteriously disappears during a sleepover with the girls in the summer before 8th grade . <P> The story then jumps 3 years later, when the girls are living their own lives and don't speak to each other . </P> <P> Aria returns to Rosewood from a 3 - year trip to Iceland with her family and comes back much more sophisticated than before she left . She meets and makes out with a guy in a local bar who is revealed later to be her English teacher, Ezra Fitz . </P> <P> Emily befriends the new girl in town, Maya St. Germain, and soon develops romantic feelings for her, even though Emily has a boyfriend, Ben . Ben later finds Maya and Emily kissing in the photo booth at a party and dumps beer on them . </P> <P> Hanna is the new popular girl in town alongside the former nerd, Mona Vanderwaal . However, she and Mona sometimes shoplift though both can clearly afford their steals . Hanna battles the urge to turn back to bulimia, and struggles to manage the stress of keeping her queen bee status . </P> <P> Spencer continues to struggle in her long - standing rivalry with Melissa Hastings, her perfect older sister . Problems occur when she begins to feel attracted to Melissa's new boyfriend, Wren Kim . </P> <P> Throughout the story, the liars get messages threatening to reveal their secrets of the present and past, including a terrifying incident the girls refer to as "The Jenna Thing". They automatically believe it is their missing friend, Alison, because she is the only one each of them confided in regarding their darkest secrets . However, they are shocked when the police find her corpse buried in the gazebo of her former house . The book ends with the liars receiving a text at Alison's funeral saying, "I'm still here, bitches . And I know everything . - A ". The girls have made up at this point . </P> </Td> </Tr> <Tr> <Td_colspan="6"> </Td> </Tr> <Tr> <Td> </Td> <Td> Flawless </Td> <Td> March 27, 2007 </Td> <Td> 978 - 0 - 06 - 088733 - 9 </Td> <Td> 330 </Td> </Tr> <Tr> <Td_colspan="6"> Spencer Hastings, Hanna Marin, Aria Montgomery, and Emily Fields continue to receive text messages from an unknown person, "A", and are more desperate than ever to discover the identity of "A", who is still taunting them with the threat of exposing their many secrets . At first the girls think "A" is Alison, because she is the only person who knew their secrets, but then they start to believe the person behind the threats is Toby, because some messages they receive refer to' The Jenna Thing' and with Alison dead, he is the only other person who was a part of the incident, although everyone but Spencer is unaware of why he took the blame for what happened to Jenna . <P> "The Jenna Thing" is revealed to be an incident in which Ali had set off a stink bomb in Jenna Cavanaugh's step - brother Toby's treehouse to get revenge after supposedly spying on her, only to see the treehouse burst into flames, not knowing that Jenna was inside, and due to that, she was permanently blinded . Toby was framed for the garage fire by Alison . </P> <P> "A" sends Emily a text message hinting that "A" knows about Emily and Maya's romantic relationship and threatens to tell everyone about it . Emily becomes close with Toby and goes to a big benefit party with him but then later tells him that she thinks she might be gay . </P> <P> "A" leaves a note for Hanna that forces her to tell Naomi and Riley that she makes herself throw up and that Sean was the one who broke up with her . Later on, she receives a text that tells her Sean is at Foxy with another girl . Hanna is shocked to discover her former boyfriend Sean Ackard ignoring his Virginity Club vows and nearly having sex with Aria . </P> <P> "A" continuously tells Aria to either' get rid of the problem' or to tell her mom the truth about Byron, her father, that he is seeing another woman . Aria goes to confront the other woman, Meredith, but when she does Meredith tells her that she and Aria's father are in love . Ella finds out that Byron is having an affair with a student named Meredith Gates and kicks him out, leaving Ella and Aria's mother - daughter relationship shattered . </P> <P> Spencer continues to date with her sister Melissa's now ex-boyfriend Wren and later loses her virginity to him . However, Melissa starts to hook - up with him as well and eventually makes sure that he will be out of both of their lives for good . </P> <P> Emily blames herself for Toby's suicide . In this book it is revealed that Toby was forcing himself on Jenna when they were in middle school and Ali and Spencer were the only ones who knew about it, which is how Alison forced Toby to take the blame . </P> </Td> </Tr> <Tr> <Td_colspan="6"> </Td> </Tr> <Tr> <Td> </Td> <Td> Perfect </Td> <Td> August 21, 2007 </Td> <Td> 978 - 0 - 06 - 088736 - 0 </Td> <Td> 298 </Td> </Tr> <Tr> <Td_colspan="6"> Now homeless, Aria goes to live with her new boyfriend, Sean Ackard . Still seeing Ezra, their relationship is broken up when Sean informs the police, having found out the secret from "A". <P> Emily plans to go to the police to stop "A", which leads to "A" taking revenge by outing her to the whole school . Emily's parents threaten to send her away if she does not attend a "de-gaying" program, however, Emily realizes she can't change who she is . </P> <P> Spencer is nominated for a Golden Orchid Award for the essay she copied from her sister Melissa, which "A" threatens to expose . Spencer's family discovers she cheated on her Golden Orchid essay, but keep it quiet to protect their reputation . Spencer comes to believe she might have killed Alison after discovering she suffers from rage - induced blackouts . </P> <P> Hanna and Mona get into a fight, and Hanna seeks comfort with an "uncool" boy named Lucas . She goes to Mona's birthday party but gets humiliated, but she receives a text from "A" and recognizes the number . She intends to reveal the true identity of "A" to the other girls, but is run down by "A" before she can do so . The girls recognize it is A from the eerie text: She Knew Too Much - A </P> </Td> </Tr> <Tr> <Td_colspan="6"> </Td> </Tr> <Tr> <Td> </Td> <Td> Unbelievable </Td> <Td> May 27, 2008 </Td> <Td> 978 - 0 - 06 - 088739 - 1 </Td> <Td> 335 </Td> </Tr> <Tr> <Td_colspan="6"> Hanna barely survives being rundown by "A", and due to a head injury, she loses her memory of the previous day, thus forgetting "A" 's identity . <P> Emily's parents catch her with Maya at a party and send her to Iowa to live with her strict, religious relatives . She is glad to be safe from "A", but after Emily is accused of threatening her cousins, she runs away . Emily returns home when she sees her parents on TV, who tell her that they love her and accept her for who she is . Emily and Maya are reunited, but Trista, a girl who Emily had met and flirted with in Iowa comes to visit, their relationship is shattered, and Emily is saddened further when she sees Trista and Noel hooking up . </P> <P> After being kicked out of Sean's house, Aria reluctantly moves in with Byron and Meredith, who announces that she is pregnant and when Bryon's and Ella's divorce is finalized, they are to be married . While at Hollis College, Aria takes an art class and befriends Jenna, who she suspects could be "A". </P> <P> "A" reveals to Melissa (Spencer's sister) that Spencer stole her essay for the Golden Orchid competition, but the family keeps quiet to protect their reputation . Melissa and Spencer grow closer, and Spencer confesses that she kissed Ian, and that he and Alison were secretly dating . When fragments of her memory from the night Alison died are restored, Spencer is horrified when it dawns on her that she may have accidentally killed Alison . </P> <P> Mona and Hanna's friendship is restored, and to celebrate Hanna's recovery, Mona and Spencer plan a party for her . Spencer is surprised to discover that she enjoys Mona's company, and even more so when Mona tells her that she has been receiving messages from "A". Hanna is thrilled that Spencer approves of Mona, and they consider letting her join their clique . </P> <P> "A" tells Aria that Meredith has a secret job at Hooters, and she goes there with Mike, only to discover that "A" was lying . Darren Wilden and several other cops are there, and Aria is tempted to tell them about "A". When Mike realizes that something is troubling his sister, he urges her to tell Darren, and she eventually does . On the night of Hanna's party, Aria tells Jenna what happened the night she was blinded and apologizes for not stopping Alison, but Jenna reveals that she and Alison had planned it together to get rid of Toby . Aria asks Jenna about "A", but Jenna becomes scared and quickly leaves, hinting that she knows who "A" is . </P> <P> Melissa confronts Spencer about seeing Ian behind her back, which Spencer denies, and when she leaves, Spencer and Mona discover another note from "A" and suspect that Melissa killed Alison because she was jealous of her relationship with Ian . They inform the others, and decide to turn Melissa in . Mona drives Spencer to the police station, and Aria tells Emily and Hanna the truth about The Jenna Thing . When Hanna says that one in four boys sexually abuse their sister, Emily tells her not to believe everything she hears, which causes Hanna's memory to return, and she is horrified when she remembers who "A" is: Mona . </P> <P> Spencer is hesitant about turning in Melissa, but Mona comforts her and convinces her otherwise . Moments later, Spencer receives a text from Emily, telling her that Mona is "A". When she receives several more from the girls, who are worrying about what Mona will do, Mona realizes that they finally figured it out . While Aria, Emily and Hanna go to the police station to tell Darren that Mona is "A", Mona drives Spencer to Floating Man's Quarry, where she explains that she saw what happened on the night of The Jenna Thing, and when Maya moved in, she found Alison's diary, which contained the girls' secrets . Using the information to her advantage, she got a new phone and became "A" to get revenge on the girls for blinding Jenna . Spencer accuses Mona of killing Alison, but Mona says that it was Ian who killed her, as Alison had blackmailed him about their relationship . </P> <P> Spencer secretly calls Darren, who overhears her conversation with Mona and learns of their location . Mona tells Spencer that she originally planned to frame her for Alison's murder, but recently grew to like her, and thus decided to frame Melissa to do Spencer a favor . She then offers Spencer her life in return that she becomes "A" with her, as they could pin the blame on someone else . Spencer refuses and Mona attacks her . They fight on the cliff's edge, and in the struggle, Spencer accidentally pushes Mona off the cliff to her death . Aria, Emily and Hanna arrive on the scene with Darren and police, and find Mona's body and an unconscious Spencer . </P> </Td> </Tr> </Table> <Tr> <Th> Book #</Th> <Th> Title </Th> <Th> Publication Date </Th> <Th> ISBN </Th> <Th> Pages </Th> </Tr>

What is the first book of pretty little liars