The first is THE TAO OF WRITING, Ralph L. Wahlstrom - Imagine. Create. Flow. This is a great book for musing about your muse. This book will help you get in touch with your creativity and remind you why you started writing in the first place.
The second is EATING IN THE LIGHT OF THE MOON, Anita Johnston, Ph.D. - How women can transform their relationships with food through myths, methaphors and storytelling. This is not writing related, but if you're a woman and you've ever struggled with food issues, I highly recommend reading this book. If you're a writer, think of it as character research.
Still on my reading list:
THE JOURNEY FROM THE CENTER OF THE PAGE, Jeff Davis - Yoga Philosophies and Practices as Muse for Authentic Writing
A WRITERS TIME, Kenneth Atchity - Making the Time to Write. This was recommended by Carla Neggers, so it's a must-read.
THE NOVEL WRITERS TOOL KIT, Bob Mayer - a guide to writing great fiction and getting it published. I recently heard Bob speak at a writer's conference and I can't wait to dig into this one.
PLOT AND STRUCTURE, James Scott Bell - Techniques and exercises for crafting a plot that grips readers from start to finish.