Unlike "Skills and Powers" and "Combat and Tactics", "Spells and Magic" does not introduce a wholly new set of rules that the other two books in the series are infamous for. "Spells and Magic" so rarely deviates from the original rules and presents so much expanded materials ( rather than totally new), you will soon be immersed into the originality of the effort. While this is basically a second take on The Complete Wizard's Handbook, it accomplished its goals so much better and quicker that it has plenty of leftover space to introduce several new subdivisions of the magic-user class and many other useful innovations. My advise as for Spells and Magic? Opt for this rules expansion - steer clear of its comrades.