Mandy, PPRN, I just took a 2-day review course and two books they highly recommended were: 1) AWHONN Perinatal Nursing, Simpson and Creehan; 2) AWHONN Core Curriculum for Maternal-Newborn Nursing, Mattson & Smith. I will be taking my exam in July, and I have purchased both books. The Core Curriculum is the one I'm reveiwing from, it is in an outline format and easier to follow. Good luck!