While I have not read the book, I am a huge fan of Charlie Kaufman. This film follows a similar vein to some of Kaufman's previous work, particularly his directorial debut "Synecdoche, New York." This is an art film and does not fit a mainstream narrative structure - every film is attempting something different. This film is like the cinematic equivalent of an impressionist painting in that it is meant to be felt as opposed to logically understood. if you're the type of person who likes to pick apart "what makes sense" in a movie, this is not the one for you. Conversely, if you have enjoyed Kaufman's past work and his sensibilities, like mind-bending narratives, arthouse horror, or surrealistic filmmaking, you will love this movie. It is not a fast paced film, but it never completely loses your attention. Additionally, there a few laugh-out-loud moments in between the uncomfortableness and surreality.