Best beginner's guide to A57

Just took the plungle into dslr, or slr with a recent purchase of the A57. Reading manual and learning to use camera in auto mode. This is my first foray from P&S and was wondering what would be the best guide online or a book for learning to use manual settings. I know David Busch’s Sony® α SLT-A55/A33: Guide to Digital Photography has received good reviews but I wonder if he will release a book specifically for the A57 or will the A55 guide be helpful enough. Found some good online classes that are not free.