The Incident of the Book in the Nighttime: A Sherlock Holmes Bookshop Mystery

As Gemma and her best friend Jayne Wilson follow Paul's trail of friends, enemies, clients, and ex-lovers through London to Yorkshire, she realizes the puzzle of Paul's last days is more twisted than she originally thought. This mystery is anything but elementary, and Gemma and Jayne have to use all their wit to get to the bottom of it before their time in London--or in life--is over.