I had a taste of OReilly books through ACM/IEEE. A few years pass and I'm working on some obscure legacy code and a book saved me. Needed it in a hurry so signed up for OReilly books for a year even though only needed it for four weeks. I have renewed it since and enjoy it, being able to dip into topics, just for fun, written by people telling a story. The long form of a book is quite different from SO and new books keep coming out. I'm hooked.