In need of a good adventure, Delaney Nichols takes the leap and moves to Edinburgh, Scotland, to start a job at The Cracked Spine. She doesn't know much about what she's gotten herself into other than that the work sounds exciting and that her new boss, Edwin MacAlister, has given her the opportunity of a lifetime.

December 1899. After the death of her beloved grandmother, Cleopatra Fox moves into the luxury hotel owned by her estranged uncle in the hopes of putting hardship and loneliness behind her. But the poisoning of a guest on Christmas eve throws her new life, and the hotel, into chaos. Cleo quickly realizes no one can be trusted, not Scotland Yard and especially not the hotel’s charming assistant manager.

Addie Greyborne loved working with rare books at the Boston Public Library - she even got to play detective, tracking down clues about mysterious old volumes. But she didn't expect her sleuthing skills to come in so handy in a little seaside town....

My life was going just fine by most standards. I ran a successful business in a tight-knit magical community, and lived just blocks from a beautiful lake and series of hiking trails. Then Selene showed up. According to some magical code I inherit my aunt's ancient familiar; a grumpy ten-pound cat with a broken filter. She fancies herself something of a saber-toothed tiger, and claims to have wrestled the thread of her ninth life from the hands of the Fates themselves—although, I'm pretty sure that last part isn't true. Almost positive.

Judith Potts is 77 years old and blissfully happy. She lives on her own in a faded mansion just outside Marlow, there’s no man in her life to tell her what to do or how much whisky to drink, and to keep herself busy she sets crosswords for The Times newspaper. One evening, while out swimming in the Thames, Judith witnesses a brutal murder. The local police don’t believe her story, so she decides to investigate for herself and is soon joined in her quest by Suzie, a salt-of-the-earth dog-walker, and Becks, the prim and proper wife of the local vicar.