Everybody thinks Irving's little sister Claire is adorable. Irving thinks she's a monster. So Irving sends away for a miracle portion that will turn him into a monster for a while - just long enough to scare Claire silly. But the plan backfires, and Claire turns into the monster - one with fangs and claws who growls and spits fire! Irving's got to do something about it - fast! But how do you handle a monster in the family?

"Manes injects enough humor and wacky happenings to keep kids happy." - Booklist

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