I have belonged to professional book clubs at a couple of schools where I've taught. The teachers in the book clubs would collectively decide on books to read. We would meet at the school site and discuss the books and talk about how we could apply theories and practices to our particular grade levels and students.
A couple that come to mind:
Mosaic of Thought: Teaching Comprehension in a Reader's Workshop by Ellin Oliver Keene and Susan Zimmerman
Teaching with the brain in mind by Eric Jensen.
I guess you could call the following books Summer Rereading. These are books I reread and review each summer to plan for the beginning weeks of the school year when learning routines and procedures is critical to an effective learning environment.
I would love to hear about your summer reading favorites.