by Joel Tietjen (Author), Meg Petrillo (Illustrator)

Matthew the adventurer and his trusted side-kick Toby embark on a perilous adventure to the secret realm of Nath. Nath is a mystical world of danger and obstacles that requires math skills, bravery, and a little luck in order to escape. Together, the duo must conquer the realm of Nath and defeat the tricky rhyming troll at all of his games in order to make it back home. Are their math skills sharp enough to be the only ones to ever defeat the troll? Find out, in Matthew the Math Explorer.