https://www.hachettebookgroup.com/titles/arturo-perez-reverte/the-final-problem/9780316608015/
Hachette Book Group is a leading book publisher based in New York and a division of Hachette Livre, the third-largest publisher in the world.
the final problemarturo perez revertefrances riddlehachette
https://www.inverse.com/article/26452-the-final-problem-sherlock-season-4-episode-3-review-recap-holmes?amp%3Butm_medium=inverse&%3Butm_campaign=organic
It's time to hang up the hat.
the final problemhopefullysherlockepisode