“You can read this book in the bath,” begins HUG THIS BOOK! (Phaidon, 30 pp., $9.95; ages 0 to 4) , written by Barney Saltzberg and illustrated by Fred Benaglia.

Sixty-five million years after the Mesozoic, we entered a new dinosaur era: Barney. The green-bellied purple dinosaur modeled kindness in educational direct-to-video movies and a 1992-2010 PBS ...

Peacock's two-part documentary, "I Love You, You Hate Me" (now streaming), traces the origins of Barney, an upbeat dinosaur who incited hatred.