Scott Ostrow’s Officer Candidate Test book has received mixed reviews. If you’re looking for a text that gives you a history of the U.S. Military Branches and information regarding what to expect in OTS/OCS this is the book for you (many found the study tips useful, as well).
When it comes to studying for the AFOQT, this book is more of a tool – not the entire toolbox you might need. There are no complete practice tests. Just four sections that review the verbal and quantitative subtests of the AFOQT.
Verdict: A good supplementary text. Don’t rely on this book alone to prepare yourself for the AFOQT. Perhaps the most useful takeaway is some of the information not included in this book: hidden figures, rotated blocks.