It's about time! From the past to the present and into the future, the Orca Timeline series explores how big ideas have shaped humanity. Discover what our collective history can tell us about the planet today and tomorrow.


Illustrated By: Suharu Ogawa

Part of the nonfiction Orca Timeline series for middle-grade readers, this illustrated book examines the past, present and future of cities around the world.

Why Humans Build Up

Illustrated By: Kathleen Fu

Part of the nonfiction Orca Timeline series, with photographs and illustrations throughout. This book explores why and how people have constructed taller and taller buildings over the course of human history.