A guide book on building a dentistry empire by following the example of the Mongolian conqueror Genghis Khan has won the annual Diagram Prize for Oddest Book Title.
Written by the former dentist Michael Young, Managing a Dental Practice: The Genghis Khan Way advises aspiring dentists to use Khan's warrior instinct to slay the opposition.
With four sections dealing with topics such as conflict resolution, strategic planning and clinical governance, the book is described by the publisher, Radcliffe Publishing, as the "how-to book on survival and empire-building in the dentistry business".
Run by the trade magazine Bookseller, the winning title is decided by the most votes on the magazine's website.
Managing a Dental Practice came first with 58 per cent of the vote at 5,032.
Coming second with 24 per cent was 8th International Friction Stir Welding Symposium Proceedings, a book about the friction stir welding scene in Germany.
Titles that made this year's shortlist include What Colour is Your Dog? and the Myth of the Social Volcano.
According to Bookseller, the quirky annual award was created in 1978 as away to cure boredom at what was apparently a dull Frankfurt Book Fair.
Since 2000, the prize has been allowed to be voted online by the public.
While the title has no cash prize it often results in sales of winning titles increasing by more than 1,000 per cent.
Previous winners include Crocheting Adventures with Hyperbolic Planes, The 2009-2014 World Outlook for 60-Milligram Containers of Fromage Frais and Highlights in the History of Concrete.