Bump-I am looking for some recommendations for books for DS5. He can read notation fairly well at this point, but it would probably be more enjoyable for him if the book is not mostly notation. I am not sure what to get because I think adult books are mostly way too advanced, but basic kid-oriented books may be too simple. He is ready to learn some more openings, endgames, and gambits. He is now able to read Chess Tactics for Kids (linked to upthread) with no difficulty, but I think he has pretty much read that one through several times now.
I am also going to recommend the app ChessFree, which we recently downloaded:
https://play.google.com/store/apps/details?id=uk.co.aifactory.chessfree&hl=enWe like this app because when you play the computer, it uses an AI engine that makes the moves more human-like. It's also not that hard to beat on the easy levels (well, for DS! not talking about me here), and has a nice 2-player version.