for Pirate vs. Pirate by Mary Quattlebaum and Alexandra Boiger
Bad Bart is the biggest, burliest boy pirate in the Atlantic. Mean Mo is the maddest, mightiest girl pirate in the Pacific. When they meet in the middle, it's a no-holds-barred contest to see who is the best pirate in the world. They test who is brave enough to swim with sharks, who is strong enough to throw a cannonball, who can eat the most hard tack, and who has collected the most treasure. Again and again their respective crews proclaim, "Tie!" Bad Bart and Mean Mo stare each other down and . . . fall head over heads in love! This epic tale of the union of two pirate captains is told in seadog lingo and illustrated with of knockout oceanic battles.
Publisher description retrieved from Google Books.