Frederic G. Melcher
Melcher proposed the Caldecott Medal in 1937 to honor children's picture books. Named for British illustrator Randolph Caldecott, the medal is presented annually for the "most distinguished picture book for children".
John Rocco
Rocco was a runner-up for the American Library Association Caldecott Medal, which annually recognizes the best in U.S. children's picture book illustration, when "Blackout" was named a Caldecott Honor Book in 2012.Another artist illustrated the first edition dustjacket for at least the first Camp Half-Blood novel by Rick Riordan, namely "The Lightning Thief". Before the end of the "Percy Jackson & the Olympians" subseries (2005 to 2009), all volumes were in print with stylistically matching dustjackets illustrated by Rocco. New cover illustrations from a single Rocco painting that spans all five books were introduced early in 2014.