The book Rusty (Nat Wolff) gives Kate (Liana Liberato) before she gives him her "present" is a 25th anniversary edition of the book "It" by Stephen King, who in the movie Rusty is an avid fan of; there were only 3552 copies of the 25th anniversary edition of "It" ever put in to print. About 2750 unsigned copies, 750 signed copies, and 52 special signed and lettered copies. While it is later mentioned that Bill (Greg Kinnear) could get a signed copy of his ex-wife Erica's, (Jennifer Connelly), favorite book through his writers connections, this probably explains how Rusty would be able to get such a rare book, while at the time of it's release the book would go for it's retail value, it is now valued at at least $350 (2014).