A book I can readily recommend without hesitation. The second book is fine and ties up some loose ends. I seem to read enough comments from people who like the third and fourth books, and I can kind of see why people might think that way – but I am nonetheless firm in my belief that they are as much of a letdown as the first two are extraordinary. (A darn good way to raise awareness about kidney stones, at least.)
You’re not thinking of Orson Scott Card, are you?