Right now, it's:
1. The Complete Brothers Grimm Fairy Tales
2. Transformations, by Anne Sexton
3. The Man Who Mistook His Wife for a Hat, by Oliver Sacks
A lot of the poems I write are collages of what I'm reading. I'll take a few pieces from one book, a few pieces from another, and maybe even a piece from one more. Then I throw them into my poem-cauldron, stir them up a bit, and those chemical reactions create a new poem-story. Familiar characteristics are recombined to make a new whole.
The list of books above are helping me with a poem that re-imagines the classic Grimm tale, "The Maiden Without Hands." Key to this re-vision of the traditional story is what I learned from reading the title story of The Man Who Mistook His Wife for a Hat. Scientific anecdotes are, by far, my favorite way into the writing of a poem.
Research is such an essential (not to mention, fun) part of the writing process. Whatever I'm reading ends up becoming a part of what I'm writing.