The leaning tower of research

I get asked quite often about the amount of research I do for my books. The short answer is "a lot." But that's also pretty boring, so just for fun I thought I'd post a more graphic illustration. Unfortunately since I finished book 3 of Trystan and Isolde before we moved, most of my research books for the trilogy are still packed in a box in our attic. But here's a picture of the research materials I've used so far on my (as yet super-secret) next project. They don't show up too well in ...