I found the Lippincott book pretty useless. The practice tests were not really like the actual OAT and the material in the book was limited. The Kaplan MCAT books are good to study review material. You will get a partial OAT with the registration packet which is a good reference, but it also is pretty short but definitely a better practice test (more realistic) than the Lippincott one. You can practice reading comprehension from almost any test prep book, i.e. MCAT, GRE, DAT, etc. They are all very similar and you do have to be able to get through that section quickly. Good luck!