(2) K-3 Encounter series. Illustrated by Harriet Popham. Karl, an Abyssinian ground hornbill, arrived at the Smithsonian's National Zoo with a damaged lower bill, which limited his ability to eat a balanced diet and participate in normal activities. Nargi's lighthearted and informative account shows how zoo staff engineered Karl a 3-D printed beak, each step in the process demonstrating how engineering and science can solve problems in animal conservation. Creative illustrations combine blueprint-like schematics with photos; a downloadable companion app is available. Glos.

Reviewer: Danielle J. Ford | Horn Book Magazine Issue: May, 2019