I use Safari Books for all my programming ebook needs. The best thing about it is searching through all books on the service. If I want to know about a specific

I use Safari Books for all my programming ebook needs. The best thing about it is searching through all books on the service. If I want to know about a specific class, function or concept I just type it in and get every book that mentions it and every occurrence in that book. The downside is the Apps, they're slow and prone to crashing which means that the web is the only viable interface.