I bought this guide yesterday and what can I say? IT'S AMAZING! You can learn A LOT from this, especially if You are a beginner (like me). The price is nothing compared to the knowledge You can get. Information in those ebooks is really HQ and I think that ANYONE can learn SQL injection or website hacking in general from these. The terminology one is the most informative! It comes with cracked tools too, they are safe to use.