Pongwiffy

Pongwiffy has it all...a hovel of her own, a sometime-friend named Sharkadder, and an odor only a witch could love. Everything is almost perfect -- until a gaggle of Goblins move in next door. Heavens above, they're enough to wake the dead. It's time to move. But where? And where will she find a much-needed assistant? Sharkadder persuades Pongwiffy to advertise...but the only assistant who answers is a hamster.
What's a witch to do? Forget about finding a new slum! How can Pongwiffy cope with a gang of Goblins, a sassy rodent assistant, and the Witches' Coven, who are waiting for an explanation? Even worse, she's responsible for Sourmuddle's 200th birthday cake. What will happen if Pongwiffy messes that up?