Ten-year-olds Flor Bernoulli, a Brooklyn fashion maven, and Lucy Moon, a Georgia farm girl, use their very different super powers to combat tiny Square Man, whose mission is to rid the universe of anything round or curved.

The Golden Rectangle 2014, Aladdin Paperbacks, New York

ISBN-13: 9781416980438

Trade paperback

The Golden Rectangle 2013, Aladdin Paperbacks

ISBN-13: 9781416980421