1926 – Christie is a darling of the literary circuit and the most desired guest in London’s glittering social scene. She can often be found at meetings of the Detection Club – where mystery writers come together to share ideas, swap secrets and drink copiously. But then a fellow author's initiation ceremony takes a gruesome turn, and one of the group ends up dead. Now, Agatha is no longer just the creator of great mystery plots – she’s a player in one.

On Stenland, there comes a time known as skeld season: one day, any woman on the island can wake with three black lines on her forehead, the mark of a skeld. Skeld season comes around without warning, and while each window of time lasts only three months, anyone a skeld turns to stone is very much dead. That's how Tess’s mother killed Soren’s parents. Maybe for this reason alone, Tess and Soren should not have fallen in love. Since the time her mother was a skeld, Tess has wanted to leave Stenland, to run from the windswept island, from her family and friends

In a place and time unknown, two elderly sisters live in a walled garden, secluded from the outside world. Evelyn and Lily have only ever known each other. What was before the garden, they have forgotten; what lies beyond it, they do not know. Each day is spent in languid service to their home: tending the bees, planting the crops, and dutifully following the instructions of the almanac written by their mother. So when a nameless boy is found hiding in the boarded house at the center of their isolated grounds, their once solitary lives are irrevocably disrupted.

1692. On the outskirts of Salem, a bookstore stands covered in overgrown vines. Inside, a young woman hides a linen-wrapped journal under a loose floorboard and runs away, panicked by the sound of hounds barking in the distance. The bookstore vanishes into thin air…

This is the day my life changes forever. It started so normally. The alarm went at 7am. My husband made bacon and pancakes for me and our seven-year-old daughter, the kitchen full of chatter and laughter. He gave me a quick kiss, told me he loved me, grabbed his wallet, and rushed off to work. Just an ordinary day. Until I get the call from the school. It was Tom’s turn to pick up our daughter. He must be held up for some reason. I find Tom’s phone under our bed. Now I know there’s something seriously wrong. I scroll through his messages. A text sent late last night: I KNOW EVERYTHING.