THE PASSING OF MR. QUINN, Agatha Christie, London Book Company, 1929, First Ed. Originally published as a short story in 1924, this became the very first Agatha Christie film adaptation, released in 1928 as a silent. This book is an adaptation of the film and predates the first book printing. 'The Mysterious Mr Quin' was a favourite of Christie. In the film, the character was Mr. Quinn. In this book of the film the character is Mr. Quinny.