Jacob van Eyck's Der Fluyten Lust-hof is the largest work in European history written for wind instruments. With themes and variations of the day, it is essential repertoire as well as being excellent study material!
The only book you need (all three volumes)
Van Eyck - what can I say? It's the ultimate recorder book. If you are a beginner, play the melody and when you're adventures enough you move on to the rest of the modes. Highly recommended!