Unicorns and Germs (Zoey and Sassafras, 6)

In the sixth book, an earthquake shakes Zoey's house.

Or maybe it's a unicorn-quake? An enormous new friend arrives in a lot of pain, and it's getting worse every day.

Zoey must work with her mom and Sassafras to find a cure -- and quickly!Each story in the Zoey and Sassafras series features a new magical animal with a problem that must be solved using science.