A swashbuckling story of two very different cat brothers and their adventures at sea.

Cecil and Anton are as different as port and starboard. Cecil, stocky and black with white patches, thirsts for seafaring adventure as he roams the docks of his harborside home, taking day trips on fishing boats when the chance comes along. Slim, gray Anton prefers listening to the sailors’ shanties at the town saloon. But one day when Anton goes to port, he’s taken to be a ratter on a ship bound for the high seas.

Knowing little of the wide open ocean that lies beyond the harbor, Cecil boards another ship in hopes of finding Anton. But what begins as a rescue mission turns into a pair of high-seas adventures.

Anton takes on a fierce rat, outwits hungry birds, and forges a forbidden friendship, while Cecil encounters dolphins and whales and finds himself in the middle of a pirate raid. On an ocean as vast as the one Anton and Cecil have discovered, will they ever see home—or each other—again?

Orange Prize–winning author Valerie Martin and Lisa Martin present a colorful cast of characters, rich historical detail, and lyrical storytelling that will delight fans of such classic animal adventures as The Wind in the Willows, Stuart Little, and Poppy.