John Hall was born in Leeds and working for 25 years as an analytical chemist before embarking on a career as a writer. His stimulating Sherlock Holmes novels are written with a wonderful knowledge of his subject and are highly popular with Sherlock enthusiasts around the world.

John Hall was born in Leeds and working for 25 years as an analytical chemist before embarking on a career as a writer. His stimulating Sherlock Holmes novels are written with a wonderful knowledge of his subject and are highly popular with Sherlock enthusiasts around the world.