Internet sensation Fiona the Hippo Book Series celebrates 500,000 sold Zonderkidz is pleased to announce that its New York Times bestselling series “Fiona the Hippo” book products have now sold over 500,000 copies in all formats in just under five years. The beloved children’s books are inspired by the world’s most famous real-life hippo, Fiona, who resides at the Cincinnati Zoo & Botanical Garden. Read More…