My Favorite Math Book(s)

I'm linking up with Donna at  Math Coach's Corner to share my favorite math book(s).  I have to confess that I have not read that many books about math.  I spent several years as a literacy coach and many more years doing reading and dyslexia intervention and have read MANY books on literacy, but I only started reading math literature when I returned to first grade 2 years ago.  Before that the only math books I really read were Math Their Way and several of Marilyn Burns' books.
But as I was preparing to return to the classroom 2 summers ago, I stumbled across Laney Sammons' book Math Stretches which led me to her Guided Math book. This book really helped me shape my vision of how I would like my math classroom to look!  I was drawn to it because Laney drew on the work of the literacy experts I had followed for years like Fountas and Pinnell and Lucy Calkins and outlined a framework for teaching math in very much the same way I had always taught reading.  I am rereading Guided Math this summer; you can read my thoughts on the first few chapters on these previous posts:
Chapter 1
Chapter 2
Chapter 3
I wasn't too successful establishing guided math in my classroom the first year I was back, but last year I took another step and set up a workshop using math stations.  Last summer I followed an online book study of Deb Diller's Math Work Stations book, and my team and I used it as our team book study this past school year.  This book was fabulous for helping us develop meaningful activities for our kids to complete!  I've shared a little bit about how I implemented stations here, here and here.
These 2 books have really shaped the structure of my math class, but as far as teaching content, the best book I have discovered so far is VandeWalle's Teaching Student Centered Mathematics.  When I want to know HOW to teach a concept, this is my go-to book!
I can't wait to see what books others choose, although my husband may block my access to Amazon if I buy any more books this summer!