To start the year off, my casual just-before-sleep reading will be "Ender's Shadow", which is a story that isn't a prequel or a sequel to "Ender's Game", but a story parallel to it.

"What We Cannot Know", which is an exploration of all the topics that we might never be able to know, such as how to predict the weather, is the universe infinite etc.

"Antifragile: Things That Gain from Disorder", because it's dauntingly long and I'm feeling masochistic.

"Commodore - A Company on the Edge" because I really enjoyed "Revolution in the Valley: The Insanely Great Story of How the Mac Was Made", so I think I'll also like seeing how another computer I really like (the Commodore 64) came about.