But the sneaky pirate, Percival, is hot on their trail, and he'll do anything to find the treasure first. How can Patrick locate the treasure and keep it out of the hands of that sneaky pirate? The Math Pirates series shows characters using math in practical (and piratical) ways. It uses exciting stories to teach kids cool math concepts. So, all aboard mateys! Get ready for a fun and educational adventure! The math concepts this book teaches are map skills.