1920s England. Sarah Piper’s lonely, threadbare existence changes when her temporary agency sends her to assist an obsessed ghost hunter. Alistair Gellis—rich, handsome, and scarred by World War I—has been summoned to investigate the spirit of the nineteen-year-old maid Maddy Clare, who is said to haunt the barn where she committed suicide.

London, 1925. Glamorous medium Gloria Sutter made her fortune helping the bereaved contact loved ones killed during the Great War. Now she's been murdered at one of her own séances, after leaving a message requesting the help of her former friend and sole rival, Ellie Winter. Ellie doesn't contact the dead—at least, not anymore. She specializes in miraculously finding lost items. Still, she can't refuse the final request of the only other true psychic she has known. Now Ellie must delve into Gloria's secrets and plunge back into the world of hucksters, lowlifes, and fakes.

July 1995. April and Eddie have taken a wrong turn. They’re looking for the small resort town where they plan to spend their honeymoon. When they spot what appears to a lone hitchhiker along the deserted road, they stop to help. But not long after the hitchhiker gets into their car, they see the blood seeping from her jacket and a truck barreling down Atticus Line after them.

England, 1921. Three years after her husband, Alex, disappeared, shot down over Germany, Jo Manders still mourns his loss. Working as a paid companion to Alex's wealthy, condescending aunt, Dottie Forsyth, Jo travels to Wych Elm House, the family's estate in the Sussex countryside. But there is much she never knew about her husband's origins...and the revelation of a mysterious death in the Forsyths' past is just the beginning.

Opal is a lot of things—orphan, high school dropout, full-time cynic and part-time cashier—but above all, she's a determined to find a better life for her younger brother Jasper. One that gets them out of Eden, Kentucky, a town remarkable for only two things: bad luck and E. Starling, the reclusive nineteenth century author of The Underland, who disappeared over a hundred years ago. All she left behind were dark rumors—and her home. Everyone agrees that it’s best to ignore the uncanny mansion and its misanthropic heir, Arthur. Almost everyone, anyway.