At the beginning of the book we meet Mrs. Collywobble, "a sweet little old lady" who "lives in a little house on the edge of a big, dark, scary wood." And to protect her from the frightful monsters who lurk in the dark, she keeps a pet frog. Who sits on her doorstep. And smiles. And nuzzles her offered hand.
Sweet little guy.
Until, that is, from out of the wood shambles Greedy Goblin, hobbling along with his cart full of stolen loot.
Nickerty-noo, nickerty-noo,When Greedy Goblin ignores the sign on the fence Beware Of The Frog, I'm afraid he comes to a bad end.
if I get a chance,
I'll steal from you . . .
As does the Smelly Troll (Welly-welly)
and the Giant Hungry Ogre (Dum-de-dum, dum-de-dummy).
Until we reach the end of the book, and Mrs. Collywobbles, in a fit of thankfulness, bestows upon her frog his one request.
What happens next is a kicker, worth the price of the book.
You'll have to read it to find out.