"Koko's Kitten" is a heartwarming true story about Koko, a remarkable gorilla who communicates using sign language. The book explores the deep emotional connection that develops between Koko and a tiny kitten named All Ball, whom Koko nurtures and cares for as if it were her own child. This touching tale not only highlights the emotional capacity of gorillas but also challenges common perceptions of animal emotions and intelligence, illustrating the profound bonds that can form across species lines.