I love when this happens with other books too. Here are two books that I just finished reading that are from other series:
1. Charlie the Choo-Choo, by Beryl Evans (a penn name used by Stephen King)
This is based on a book from The Dark Tower series by Stephen King. In the third book, The Waste Lands, we learn about Blaine the Train, who is based off this book. You can certainly read this "children's" book alone and enjoy it, but once you read The Waste Lands, you'll see it has a much darker connotation and you start to look at the illustrations in a much different light.
2. Tak Companion Book, by James Ernest & Patrick Rothfuss
This is a book which was actually put forth by a kickstarter from Patrick Rothfuss, creator of The Kingkiller Chronicles. Tak is a game introduced in the book. Patrick put forth this kickstarter with this guide book to tell you about the history as well as the rules, and I loved reading it! In the series they just play it, they don't go over the rules or anything like that. Reading this book has made me that much more impressed by the characters who have mastered the game, and I fully intend to make my own game board some day!
What other books series have you read that produced other books which enhanced the story?
