[1] The international bestseller about a handicapped teenage rebel has been licensed to 33 nations and was made into a feature film by Hans-Christian Schmid (see here), and has drawn comparisons to Jerome Salinger's Catcher in the Rye.

Benjamin Lebert and his father were close, they bonded over the similar taste of the Rock and Roll lifestyle and music.

He was influenced by American pop culture like Pink-Floyd, Jekyll and Hyde (the musical), Rolling Stones, etc.

[4] This prevented him from performing basic tasks such as tying his shoes, using utensils, and working with his fine motor skills.

The book gets its name from one of the characters, Benni's roommate Janosch, who uses "crazy" frequently to describe events they encountered as thrilling and exciting.

Like Lebert, Benni suffers from partial paralysis on the left side of his body and struggles achieving passing grades in school.

Benjamin has a great relationship with his sister who always lets him accompany her on adventures with her lesbian friends.

To also quote a negative voice, a Kirkus Reviews article criticizes the generality of the characters’ adventures, and the repetition of discussions on “life, God, and sex are unfortunately both redundant and banal”[7] The author also dismisses claims made that Crazy is similar to The Catcher and the Rye by J. D. Salinger, saying, “Salinger’s Catcher remains the gold standard.