If you haven't read the work of Gregory Maguire, I urge you to read through every novel he's written. I'm now reading his latest, SON OF A WITCH, and it's as good as everything else he's done [Wicked, Confessions of an Ugly Stepsister, Lost, Mirror Mirror].
To whet your appetite, here's one simple little quote from SON OF A WITCH, that had me laughing and snorting on the train last night. Buy it! Read it! He's amazing.
"'I hate to be obvious,' added the Scarecrow, 'but you'd have saved yourself a heap of trouble if you weren't too cheap to invest in a leash, Dorothy.'"