Chris McMullen and Carolyn Kivett are a son-and-mother combination who teamed up to write a variety of word puzzle books and, recently, some children’s books, such as math flash cards for the Kindle. CHRIS MCMULLEN holds a Ph.D. in theoretical high-energy physics (aka particle physics) from Oklahoma State University. He teaches physics at Northwestern State University of Louisiana. In addition to solving verbal and math puzzles, he enjoys playing chess and golf and writing books in his spare time. His mother, CAROLYN KIVETT, loves solving verbal puzzles, such as anagrams and crossword puzzles. She runs a small business in southern California where she manufactures covers for outdoor entertainment centers and golf cart enclosures from scratch. She enjoys the challenge of sewing materials into new geometric shapes, which is a three-dimensional visual puzzle. She loves to collect teddy bears and sunflowers, and also enjoys playing golf.