TTW is a much abridged and largely sanitised version of the novel. Henry is a librarian with a genetic disease that causes him to travel through time. He meets Claire when she’s really young and he’s already married to Future Claire. The time travelling concept is intriguing, but the acting isn’t great, and many exciting (and slightly risqué) aspects of the novel are completely removed. The novel’s Henry is more awesome and Claire less annoying, but the pacing of the film means all that (and the author’s many references to other novels and German poetry) is lost. Read the book.