Laurie Coulter is the author of six books, including "Secrets in Stone: All About Maya Hieroglyphs." She lives in Toronto.
Martha Newbigging has illustrated many books, including "Research Ate My Brain," "Attack of the Killer Video Book" and two other books in this series: "Cowboys and Coffin Makers" and "Archers, Alchemists and 98 Other Medieval Jobs You Might Have Loved or Loathed." She lives in rural Ontario.