I've come across a few more books about preemies but most are individual parent's stories. I finally found one that is great for my needs from the same group as the NICU book but this one is on preemie development. According to my pedr my bub is a bit behind the milestones expected so this book is awesome for my needs, I recommend it to any parent of a prem who has difficulties or if you just want to be on top of things.

http://ebooks.preemiehelp.com/