Basically, it's a fairly fundamental level medicinal chemistry textbook that probably pitches at nurse training or first year BSc level. I read it because I love that sort of information (although not enough to ever make a career in it) and my knowledge is out of date. Covers relvant biology, the CNS drug actions and interactions for an interesting variety of prescription drugs, plus some recreational drugs (with plenty of firm warnings against their use :)). Would imagine anyone on my friends list could pick it up and make use of it, did what I wanted it to, very good.