When I began learning about blackjack and card counting, I read every book that I could lay my hands on, practically camping out at the libraries and bookstores. I read hundreds and hundreds of books, but only purchases a dozen or so initially.
I know I read the S.E.X. system, but honestly can't remember much about the book or even what S.E.X stands for. I tend to remember the books that I thought were full of garbage, like the Core system and most of John Patricks books and so many others that I am not going to trash, and I purchase the books that I find valueable resourses. This book fell into neither catagory. I think it covered the very basics of counting using hi-lo running count only, no indices. Very standard info, that could be found in dozens and dozens of other books and probably presented better.