Lucky Nickel Acres has survived its greatest challenge yet—establishing itself as a true Greenhold sanctuary. But just as Ben Nickels settles in to enjoy his newborn children and recently pregnant wives, an urgent summons arrives from Queen Nyssael, the ancient Lamia guardian of the Stone Coil Monument. The Great Barrier between worlds is weakening, demons are possessing the dead, and only a Keeper's touch can activate the monuments that will save Faerowilde from invasion. With a hand-picked team including the loyal shepherdess Estelle and the increasingly devoted Helena and Renee, Ben ventures into the steaming jungles of Nagaina territory. But Queen Nyssael isn't just looking for a hero—she wants Ben's legendary breeding prowess for herself, and she's not the type to take no for an answer. Armed with his growing Keeper powers, his trusted handbook, and enough stamina to breed an army, Ben races to activate the monument network before the demon invasion begins. But with great power comes great responsibility—and an ever-expanding list of beautiful creatures who need his very personal attention.