These green books are poisonous—and one may be on a shelf near you A toxic green pigment was once used to color everything from fake flowers to book covers. Now a museum conservator is working to track down the noxious volumes. Libraries and rare book collections often carry volumes that feature poisons on their pages, from famous murder mysteries to seminal works on toxicology and forensics. The poisons described in these books are merely words on a page, but some books scattered throughout the world are literally poisonous. These toxic books, produced in the 19th century, are bound in vivid cloth colored with a notorious pigment known as emerald green that’s laced with arsenic. Many of them are going unnoticed on shelves and in collections. So Melissa Tedone, the lab head for library materials conservation at the Winterthur Museum, Garden & Library in Delaware, has launched an effort dubbed the Poison Book Project to locate and catalogue these noxious volumes. https://www.nationalgeographic.com/science/article/these-green-books-are-lit... -- This message has been scanned for viruses and dangerous content by MailScanner, and is believed to be clean.