I've been using "NMLW" for about 4 years now. I remember being frustrated that books don't come with it. The gesture prompts are good, but I"ve changed a few of them. For /b/, I have a picture of a doctor listening to a heartbeat and our gesture is tapping our hearts...
Scholastic has a few good books, like Four Furry Feet.
http://shop.scholastic.com/webapp/wc...atalogId=10004
Here is something reproducible that could work
http://shop.scholastic.com/webapp/wc...atalogId=10004
I use a combination of Scholastic and my own books that I've made. I went to Villanova University, so the /v/ book is "My Villanova Vacation".
It took me a couple of years to put it all together. I still make adjustments because some books are too easy as the kids seem to be reading earlier and earlier!