I'm reading about four books at once, right now. "About" four because I'm more than halfway through Simon Young's Designer Evolution and Stephen Wilkinson's Bodies for Sale, and a bit bogged down in Jeff McMahan's The Ethics of Killing. I'm just about to start Bruce Sterling's new collection, Visionary in Residence, which I've been asked to review. I'll need to concentrate on it before I can finish the others. There are actually some others that I need to get back to, but I'll probably have to start from the beginning.
The books by Wilkinson and McMahan are treasure troves, but they demand slow, thoughtful reading and copious note taking.