Sisterhood Sleuths® Series Book 1 Something is stirring beneath the streets of Upland… and it begins with The Obsidian Eye. Welcome to Upland, California—a picturesque city nestled at the base of the San Gabriel Mountains, where sunny days, community charm, and peaceful neighborhoods hide a secret far older—and darker—than anyone could imagine. In The Obsidian Eye, the first thrilling installment of the Sisterhood Sleuths® series, readers are introduced to Chloe and Lily—two