I have found that the following books are still of interest and use to me, although I have 'walked away' from JW:
1. Greatest Man Whoever Lived
a lot of nice general info about Jesus' life that is easy to read
2. Mankind's Search for God
this was the first book I had read that covers (albeit lightly) other religions. I learned how so many are similiar, and it piqued my interest in learning more about them.
3. The Great Teacher Book
a great book with to use to show how kids can apply bible lessons in their own life. Again, I don't agree anymore with all the lessons, but still a nice read book geared to be read out loud.
4. My Book Of Bible Stories
Easy to understand book that takes kids through the bible chronologically. Again, there are a few stories that many nonJWs may object too, but overall, it gives a really good overview of characters in the bible.
I have kept most of my books....partly because I am a packrat, and partly out of nostalgia. I chucked my back issues, but kept the bound volumes, cordances, bibles, etc.
What have you kept?