Plantzilla — Jerdine Nolen

Mortimer Henryson loves Plantzilla, the plant he's been taking care of all year in his third-grade classroom. He loves him so much, he takes him home for summer vacation. What could go wrong with a . . . plant? But life in the Henryson household soon takes a strange turn. A pot roast disappears, then steaks from the grill--and where has Mrs. Henryson's prize Chihuahua gone?
In this hilarious story told ingeniously through letters, Jerdine Nolen and David Catrow team up to show that when there's enough love, even the most unlikely character can become part of a family.