An unexpected snow storm causes trouble for the magical creatures of the forest and Zoey and Sassafras have problems while rescuing some trapped caterfly eggs.

Making a terrible discovery at the stream about a mysterious threat that is endangering its magical creatures, Zoey and Sassafras race against time to discover the source of the problem and save the Merhorse species.

After discovering that injured animals come to the barn in her backyard for help, it is up to Zoey and her cat Sassafras to help new arrival Marshmallow, a sick baby dragon.

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!

"Molly gets things stuck in her head sometimes. When she sees a jar of candy on Principal Shelton's desk, she absolutely needs to know how many candies are in that jar! Luckily, her two best friends, Simon and Rosie, are ready to help her find the answer--even if it means detention for all of them!"--