Ask Slashdot: Good, Relevant Usability Book?

First time accepted submitter osman84 writes "I've been developing web/mobile apps for some time, and have managed to build up some decent experience about usability. However, as I'm growing a team of developers now, I've noticed that most of the young ones have a very poor sense of usability. Unfortunately, since I was never really taught usability as science, I'm having trouble teaching them to develop usable apps. Are there any good books that make a good read for general usability guidelines for web/mobile apps? I have a couple from my college days, but I'd like something more recent, written in the era of mobile apps, etc."