The Mystery of the Missing Antimatter (Science Essentials). Title: The Mystery of the Missing Antimatter (Science Essentials). Author: Quinn, Helen R.; Nir, Yossi; Modan, Rutu [Illustrations]. Subjects include: cooking, history, sports, Christianity, religion, education, hobbies, crafts, quilting, art, textbooks, Minnesota, science, biographies, counseling and therapy, diet and nutrition, parenting, nature, etc.