First I should say that this is a great book. It is the second book in the Foundation Trilogy. And if you need some help on the order of the books, here tis : 1)Prelude to Foundation 2)Forward the Foundation 3)Foundation 4)Foundation and Empire 5)Second Foundation 6)Foundation's Edge 7) Foundation and Earth. #s 3,4, and 5 are the original trilogy. I have reviewed all of them. They're all good. This particular book has two parts. In the first part the Foundation is faced with the dying but still strong Galactic Empire, and in the second, more interesting part, they face the rising Mule. A few words bout him, he's not what or who you might think he is. The next sentence might be considered a spoiler, so choose to read it or not. The Mule is actually Bobo( this word only appears once in the book, and might be missed). Well, have fun reading!