<P> Crank was inspired by the life of Ellen Hopkins's daughter, Cristal, who was addicted to meth . In an email from the author, Ellen Hopkins said her daughter had been clean for four years, as of 2017, but has also spent 18 months in prison . Although the novel is fiction and is only "loosely based" on Ellen Hopkins daughter's own story, it is according to Ellen Hopkins, 60% fact . </P> <P> The novel Crank is written in a form of free verse . Her poetry has been called "interior ." Critics note that Ellen Hopkins's "hypnotic and jagged free verse," plays with the spacing of the words on the page, forming her signature "mirror poems ." The narrative perspective of her work has been described as "combin (ing) outside analysis with first hand perspectives from behind the characters ." </P> <P> Addiction, the consequences of one's choices, and coming of age have all been noted as major themes in the novel . Reviewers explained that Crank "gives a look into...drug addiction and its life changing consequences ." Reviewers also noted Kristina must face that "there is no happy ending when it comes to addiction" and understand the consequences of her actions . Another major theme is coming of age, as critics say "Adolescence is a time of conflict and contradiction, (clearly seen in) the conflicted character Kristina / Bree in Crank ." </P> <P> Crank, Ellen Hopkins's first novel, received mostly positive reviews . Publishers Weekly praised Hopkins, saying, "The author is definitely on a mission, she creates a world nearly as consuming and disturbing as the titular drug ." Hopkins's books are widely known for their "gritty realism" and for talking about "Subjects that are really big...Suicide . Incest . Prostitution . Bulimia . Rehab ." Philadelphia Inquirer said that these "dark" subjects have not turned away teens, rather, "readers raced through hundreds of pages ." </P>

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