Out of the twenty-something Xanth books I've read over the years, this is my favorite.
I've gone through it several times (read the thing in a day the first time), and I'm not all that sure why. These always have a love story, which is nice, and the hero (or heroine). Plus, Smash is an Ogre, which means super-strength, and that just has appeal to me.
I guess I won't write a summary of the book, you can always read the back cover, but I like these because I get lost in them, and lost I do.