http://www.amazon.com/Around-Block-J...6092760&sr=8-4
This one is awesome b/c it gives you measurements to produce blocks in several sizes. The Dear Jane book (I just recently purchased) has applique and hand pieced 4"? blocks and is a very unique book. I also feel like it is more advanced than making typical pieced blocks.
If you are looking to make the Dear Jane quilt, get that book. If you are looking for a reference for tons of different blocks, the one from my link is great. You can get alot of block patterns for free on line but I love to peruse books.