Book excerpt: Designed to appeal to the book lover, the Macmillan Collector's Library is a series of beautifully bound pocket-sized gift editions of much loved classic titles. Bound in real cloth, printed on high quality paper, and featuring ribbon markers and gilt edges, Macmillan Collector's Library are books to love and treasure. A fascinating collection of ingenious mysteries which all pose the question 'howdunnit?' - 'how was the crime done?' Featuring well-known sleuths from Sherlock Holmes to Father Brown, as well as the less familiar, including Jacques Futrelle's Professor Augustus S. F. X. Van Dusen, in each story the reader is invited to play detective and is presented with a challenge: can you solve the mystery before the solution is revealed? Such stories reached their height of popularity in the Victorian and Edwardian eras; this collection, edited and introduced by David Stuart Davies, brings together stories from such masters of the genre as Edgar Allan Poe, Wilkie Collins and G. K. Chesterton.