When Mouse’s dad asks her to clean out her dead grandmother's house, she says yes. After all, how bad could it be? Answer: pretty bad. Grandma was a hoarder, and her house is stuffed with useless rubbish. That would be horrific enough, but there’s more - Mouse stumbles across her step-grandfather’s journal, which at first seems to be filled with nonsensical rants...until Mouse encounters some of the terrifying things he described for herself.

Marra never wanted to be a hero. As the shy, convent-raised, third-born daughter, she escaped the traditional fate of princesses, to be married away for the sake of an uncaring throne. But her sister wasn’t so fortunate—and after years of silence, Marra is done watching her suffer at the hands of a powerful and abusive prince. Seeking help for her rescue mission, Marra is offered the tools she needs, but only if she can complete three seemingly impossible tasks:

Cordelia knows her mother is . . . unusual. Their house doesn’t have any doors between rooms—there are no secrets in this house—and her mother doesn't allow Cordelia to have a single friend. Unless you count Falada, her mother's beautiful white horse. The only time Cordelia feels truly free is on her daily rides with him. But more than simple eccentricity sets her mother apart. Other mothers don’t force their daughters to be silent and motionless for hours, sometimes days, on end. Other mothers aren’t sorcerers.

When Alex Easton, a retired soldier, receives word that their childhood friend Madeline Usher is dying, they race to the ancestral home of the Ushers in the remote countryside of Ruritania. What they find there is a nightmare of fungal growths and possessed wildlife, surrounding a dark, pulsing lake. Madeline sleepwalks and speaks in strange voices at night, and her brother Roderick is consumed with a mysterious malady of the nerves. Aided by a redoubtable British mycologist and a baffled American doctor, Alex must unravel the secret of the House of Usher before it consumes them all.

Three years later, Stephen is a broken paladin, living only for the chance to be useful before he dies. But all that changes when he encounters a fugitive named Grace in an alley and witnesses an assassination attempt gone wrong. Now the pair must navigate a web of treachery, beset on all sides by spies and poisoners, while a cryptic killer stalks one step behind....