<p>As a fellow (and even competing!) author, I would like to make two additional points supporting Pwn and Erica:</p>
<ol>
<li><p>While you do see self-promotion here at CC , you do not see that kind of thing with these two authors. They do not come on to promote themselves and they don’t have any mysterious new-member friends (or alter-egos) who have joined or been created only to talk up some book or website. So in that way, referencing them in this thread is unfair. </p></li>
<li><p>Lots of books start out at Amazon with friendly reviews. But look deeper and look at what people say after the initial honeymoon has passed. You can tell when the reviews are all written by the same guy. Also, it is a particular compliment when other tutors like your material. They have more experience than a student who only has to get through this ordeal one time!</p></li>
</ol>
<p>In any case, for these two athors, you don’t have to rely on reviews: they both have extensive (and FREE) blogs where you can browse around and decide for yourself whether they know what they are talking about. After visiting Erica’s blog, I bought her book for my kids. And while I like Pwn’s blog, I don’t spend time there because I’m giving my kids my own book instead. :)</p>
<p>Phil Keller
New Math SAT Game Plan</p>