This is one of the best books I've read. It was worth every penny and contains recipes to hundreds of European style flies, some of which are the best I've ever seen. It is available at bluequillangler.com It is a must read for any passionate tier.
It is not the cheapest but this isnt a book you read and then never pick up again. There is so much you can implement into your own style from these patterns that it will be useful for a long time. The price is $39.99