found: Silly celebrations! 1998:t.p. (Yayo [illustrator]) p. [3] of cover (b. in Colombia and now lives in Montreal, Can.; "His award-winning cartoons and illustrations have appeared in books, newspapers, and magazines, as well as in exhibitions throughout the world")
found: Hopkins, Lee Bennett. I am the book, 2010:CIP t.p. verso ("Illustrations copyright ? 2010 by Diego Herrera (Yayo)")
found: LAC internal file, November 22, 2019(access point: Yayo; born in Colombia; has lived in Canada since 1987; real name: Diego Herrera)
found: The mysterious stones, 2020:LAC CIP title page (Yayo) LAC CIP application (Canadian; born 1961)