I’m very interested in looking at story outside the boundaries of a book, so the e-game book, A Dungeon Master, caught my eye. It’s like a choose-your-own-adventure or text-based game, but your actions have realistic and meaningful impact on the fictional, simulated world.
I recently finished Make: A Bootstrapper’s Handbook by Pieter Levels. It is written for app developers, but I really liked how applicable some of his advice on ideas, building, and launching were to the indie author. And again, I loved his different approach on how to make a book.