From the Publisher:
The Traveling Trunk Adventure series follows two brothers who find themselves scattered across history, from the New World to the Great Wall of China. Each chapter book includes an educational component and a daring mix of comedy, peril, and timeless values.
When brothers Ethan and Dallin are transported back to the ancient city of Atlantis, they find that Poseidon’s wrath has been kindledsomething of his has been stolen and he will destroy the entire city to get it back. Together the boys seek to unravel the mystery, all while escaping from a three-headed dog and his master, outwitting a corrupt magistrate, and battling a slithering thief from the Underworld. Along the way to discovering what Poseidon seeksas well as finding a way back homethey also make new friends and work to reunite an enslaved girl with her father.