Elizabeth A. Dauncey is a freelance plant toxicologist. She is the coauthor of Plants That Kill: A Natural History of the World’s Most Poisonous Plants (Princeton) and the author of Poisonous Plants: A Guide for Parents and Childcare Providers. Melanie-Jayne R. Howes is a pharmacist and chartered chemist. She leads research in phytochemistry and pharmacognosy at the Royal Botanic Gardens, Kew and is the coauthor of The Gardener's Companion to Medicinal Plants.