本书与《饥饿的狮子》和《矮胖子》是同一个作者兼插画家，以一个吸血企鹅家庭在动物园的一天，讲述了一个讽刺诙谐的冒险故事。

一个星期六的早晨，小德古拉和他的家人一起去动物园参观。动物园里的小企鹅和家人住在企鹅馆里。但是这些无畏的年轻冒险家并不想呆在自己的圈子里。

相反，德古拉宝宝溜进了企鹅馆，在馆里吃饭、游泳和闲逛了一天，而企鹅宝宝则蹒跚着坐进婴儿车，探索动物园的其他地方。德古拉的家人甚至都没有注意德古拉不在婴儿车里——他们能把自己的宝宝带回家吗？

本书讲述了在父母不注意时发生的恶作剧，相信观察力强、喜欢冒险的小读者一定会喜欢这个故事。

From the critically acclaimed author and illustrator of A Hungry Lion and Stumpkin comes a charming, wryly humorous story of adventure, mistaken identity, and a vampire family’s day at the zoo.

On a Saturday morning, baby Dracula visits the zoo with his family, where baby Penguin lives with hers. But these intrepid young adventurers are not content with staying in their proper places.

Instead, baby Dracula slips into the Penguin House to spend the day eating, swimming, and hanging around, while baby Penguin waddles into the stroller to explore the rest of the zoo. Dracula’s family doesn’t even notice the switch—will they bring the right baby home?

Observant and adventurous young readers will love this tale of the shenanigans that happen when parents’ backs are turned.