Persephone & the Unicorn's Ruby - Joan Holub - Bog

Persephone and Aphrodite are continuing the quest to try and find some missing jewels. They end up meeting a lost bunny in their travels, who's looking for the Castle of What-Ifs. The girls end up in a magical, delicious land, where they meet a unicorn made of chocolate, with a very special crown--one that might be the key to finding one of the missing jewels.