<Tr> <Th> ISBN </Th> <Td> 978 - 0 - 525 - 55536 - 0 (unsigned edition); 978 - 0 - 525 - 55538 - 4 (signed edition) </Td> </Tr> <P> Turtles All the Way Down is a young adult novel written by American author John Green, published on October 10, 2017 by Dutton Books . It is his fifth solo novel, and his seventh overall . Its publication was announced during VidCon 2017, the online video conference co-founded by Green and his brother Hank . It is his first published work since his 2012 novel The Fault in Our Stars . </P> <P> The story centers around 16 - year - old Aza Holmes, a high school student living with multiple anxiety disorders, and her search for a fugitive billionaire . The only other details of the plot revealed to the public before release were that it was to contain, either literally or figuratively, a tuatara, Star Wars fanfiction, an unexpected reunion, friendship and values of life . </P> <P> Speaking about the novel, Green stated: "This is my first attempt to write directly about the kind of mental illness that has affected my life since childhood, so while the story is fictional, it is also quite personal ." </P>

How many words is turtles all the way down