I'm taking the Praxis II Middle School Social Studies test in a couple of months, studying now. Does anyone know what's better to use as a study guide -- AP US History for Dummies or US History for Dummies? (Also planning on picking up World History for Dummies.) It's been quite a while since my college history classes. (I'm getting my alternative path certification after a career in business communications.) I have the book/guide from ETS, too. Any advice on what to read/study is greatly appreciated.