Book of Love is a 1990 American romantic comedy film directed by New Line Cinema founder Robert Shaye. It is based on the autobiographical novel Jack in the Box by William Kotzwinkle (the novel's name was changed to Book of Love during this film's original release). The film was originally PG-13, but subsequent DVD releases have been the R-rated Director's Cut (R for sexual content and language). It stars Chris Young, Keith Coogan, and John Cameron Mitchell.