Amazon is offering a pretty cool deal on sub-$10 books – if you buy three, they’ll throw the fourth one in free.
Here’s the photography section.
If I hadn’t just ordered Apple Pro Training Series: Aperture 3, I’d be picking up the following titles:
All of these books are pretty affordable, ESPECIALLY if you are willing to buy from a third-party seller or pick up a used copy. Some of them will be less than $3 in those cases.
In my personal experience, third-party sellers on Amazon have usually been pretty trustworthy – I’ve placed dozens of orders from ranging in cost from $2 to over $200 and have never had a single problem.