My Life as Polluted Pond Scum by Bill Myers

Take one monster lurking in the depths of a mysterious lake. Add one glowing figure with powers to summon the creature to the shore. Stir in one Wally McDoogle, who reluctantly stumbles upon the truth:

And you have the recipe for another. . .

Laugh-filled McDoogle disaster.

Being a hero is the last thing on Wally's mind, but the fate of his entire town is at stake. Now he must race against the clock, his own fears, and his world renown klutziness - and learn to trust God - before he has any chance of saving the day,