<p>I agree. Mike and Erica are two very honest authors. I’ve learned a great amount from Erica’s Grammar Guide, and Mike’s PWN The SAT book is superb. I can’t imagine either of them promoting their own book. Also, as the others have stated, they both maintain (very helpful) blogs. Mike also gives away a lot of his books, so that is why many reviews are not Amazon verified purchases. Anyways, I’m very thankful to have these two amazing authors aid me in my SAT prep journey!</p>