Árthur Conan Doyle 
A Study in Scarlet [EPUB ebook] 

The novel responsible for launching into the world what would become the most famous detective even a century after his appearance.
A Study in Scarlet is a gripping thriller, the meeting of two different and complementary characters, Dr. Watson, the narrator, and Sherlock Holmes, the detective. Investigating a crime in the present that hides a web of intrigue from the past. Holmes uses his sharp mind and impeccable deduction to unravel the mysteries of a crime that challenges Scotland Yard.