The book ends the same way as the show—with Tully (Katherine Heigl) reading Kate’s “beyond the grave letter” and dancing to “Dancing Queen” outside of the funeral venue. *Wipes tear*
The ending is raw, heartbreaking and something that everyone can relate to. But there are a few made-for-TV elements that benefited the story without overshadowing the main theme of everlasting friendship. For example, in the show, Kate spends her final days writing a book about her life, titled Firefly Lane, which is gifted to Tully after Kate’s passing. (This didn’t happen in the book.)
Another TV add-on is Marah’s (Yael Yurman) wedding. Throughout the second half of season 2, the episodes show flash-forwards to Marah’s future nuptials. The scenes feature heartfelt moments between Tully and Marah, but Kate isn’t seen. So, the viewer is left to wonder if Kate is there (but not shown) or, well, you get the idea.