So I had recently gone to my library and checked out the Barron's Officer Candidate School Tests book. The book was published in 06 but was wondering if anyone used this book compared to the Barron's Military Flight Aptitude Tests book (which I have). I was comparing the practice tests and it seems they are both different on each book. Each book has two practice tests. Also, the Barron's OCS book has practice questions on it for each section ( math, mechanical, reading). I know from my experiences that Barron's book have A LOT OF errors on their answer sections. My question is am I better off ditching the OCS book and just use the one I own (MFAT book)? the MFAT book has question that closely relate to the ASTB when i took it. or just use it to do more practice? Anyone used the Learning Express books or the CLiffnotes book and their thoughts on it? Thank You.