safaribooksonline.com is the monthly rental version for O'Reilly's books. I generally stick with the O'Reilly books, and avoid Packt books like the plague. The

safaribooksonline.com is the monthly rental version for O'Reilly's books. I generally stick with the O'Reilly books, and avoid Packt books like the plague. The case studies seem to be hit or miss. I haven't tried the videos yet, although it looks like that's where they're doing the most work.