Dragonkeepers by Michael Menzel

Even dragons start small. Before they can fly and breathe fire, they need to be well protected. As experienced dragonkeepers, this is exactly your task. To do this, you use the "magic book". The two open pages show you which dragons, and how many, you can take under your protection. It goes without saying you have a few clever tricks up your sleeve in order to manipulate the book in your favor. The best dragonkeeper wins this fantastic contest!