ISBN-13: 9780692633724 / Angielski / Miękka / 2016 / 28 str.
A stolen square from the Shape Museum leads Detective Octavius on a crime solving adventure. Using his math and engineering skills, Octavius finds the square in the hands of the most unlikely suspects. From the author and illustrator of the award winning "Terrance the Trapezoid," readers learn math skills, creativity and the power of working together.