A stolen treasure, a secret pact among four convicts, and two corrupt prison guards. The Sign of the Four also presents the detective's drug habit and humanises him in a way that had not been done in the preceding novel, A Study in Scarlet. It also introduces Doctor Watson's future wife, Mary Morstan.
| ISBN: | 9781787246225 |
| Publication date: | 5th July 2018 |
| Author: | Arthur Conan Doyle |
| Publisher: | Distributed By PublishDrive |
| Format: | Ebook (Epub) |