Henry Walker is the 5-year-old son of Gabrielle and Mr. Walker. He has a younger sister named Grace.

In Book #18, he briefly got lost at the American Museum of Natural History.

Ad blocker interference detected!

Wikia is a free-to-use site that makes money from advertising. We have a modified experience for viewers using ad blockers

Wikia is not accessible if you’ve made further modifications. Remove the custom ad blocker rule(s) and the page will load as expected.