[1] She has illustrated role-playing game materials for Dungeons & Dragons, including the AD&D second edition Tome of Magic and Legends & Lore.
Once Upon a Cool Motorcycle Dude, published by Walker Books in 2005,[5] won the annual Monarch Award in 2009 by vote of Illinois schoolchildren in grades K–3.
O'Malley illustrated the frame story while Heyer and Scott Goto portrayed the segments created by the schoolgirl (Heyer, "Princess Tenderheart ... in flowing silk gowns and blonde tresses") and schoolboy (Goto, the Dude and a giant introduced in "testosterone-soaked oils").
[5] The same authors created a sequel, Once Upon a Royal Superbaby (Walker, 2010), featuring the son of now-Queen Tenderheart and the Motorcycle Dude.
OCLC 504222991 The picture books both written and illustrated by Heyer are Christmas and Easter stories, primarily, and re-tellings of fairy tales and legends.