I'm an avid reader of eBooks and IT Security has taken my curiosity for quite a while now. There are a number of online forums and references available and a few sites that serve as testing ground for would-be IT Security enthusiasts. Right now though what caught my attention is a site that caters for a free version of their magazine HITB Magazine.
True to the idea of the Open Source community, this site offers this knowledge rich reference for free. So far, they have been able to release issues on a regular basis (I wonder though how long that will last). It's like an FHM for for hackers :) and I'd recommend it for people who want to get updated on the who's who and what's what of the IT Security world.