Time travelers Jonah and Katherine arrive in 1611 to rescue missing child John Hudson, son of the explorer Henry Hudson, but just as the mutiny on the Discovery is supposed to start, Jonah and Katherine's knowledge of history is tested once again, and they fear that more is at stake than just one boy's life. Author's note includes facts about Henry Hudson's explorations.

"You might know that Columbus discovered America, Lewis and Clark headed west with Sacajawea, and Sally Ride blasted into space. But what do you really know about these bold explorers? What were they like as kids? What pets or bad habits did they have? And what drove their passion to explore unknown parts of the world? With juicy tidbits about everything from favorite foods to first loves, Lives of the Explorers reveals these fascinating adventurers...