H. P. Lovecraft (20 August, 1890 – 15 March, 1937), born as Howard Philips Lovecraft was an American writer known for horror fiction and spectacular monsters.

Arthur Conan Doyle ((22 May, 1859 – 7 July, 1930) was a Scottish author most famous for creating the fictional detective Sherlock Holmes.

The book is really a battle of wits between The Great Houdini and Margery, who despite their competition came to like one another (for a time).

Trained as a physician, he opened a practice but closed it because he never received any patients.