The Edge of the Unknown by Arthur Conan Doyle 1st / 1st 1930
First edition published by John Murray in 1930. A very good or better copy without the dustwrapper. The boards are in excellent shape with only the odd very light mark. The book is square and binding tight. There are no bookplates and no ink. The upper text block has some foxing marks and the first few pages occasionally so. Overall a nice copy and better than is usually found.
Arthur Conan Doyles last published book in his lifetime. It is a collection of essays and articles that had been originally published elsewhere such as The Strand and Daily Express, including an essay on Houdini.