Know it All

Julie Whitaker is a writer and researcher currently living on Vancouver Island, Canada. She has contributed to many books, including Did You Know?, the Picturepedia series, the Quizmasters series and several encyclopedias. Susan Aldridge is a journalist and author specialising in chemistry, medicine, health, psychology and popular science. She has contributed to several encylopedias and her other published works include Use Your Brain to Beat Addiction and The Thread of Life: The Story of Genes and Genetic Engineering. Elizabeth King Humphrey lives in North Carolina and has many writing credits to her name, has taught English and creating writing classes and was a member of the Student Advisory Board for UNC Wilmington's Publishing Laboratory.