Agatha Christie is known throughout the world as the Queen of Crime. Her books have sold over a billion copies in English with another billion in over 70 foreign languages. She is the most widely published author of all time and in any language, outsold only by the Bible and Shakespeare. She is the author of 80 crime novels and short story collections, 20 plays, and six novels written under the name of Mary Westmacott.

Alyssa Cole is an award-winning author of historical, contemporary, and SFF romance. Her books have received critical acclaim from The New York Times, Library Journal, BuzzFeed, Kirkus, Booklist, Jezebel, Vulture, Book Riot, and Entertainment Weekly. She can usually be found watching anime with her husband or wrangling their menagerie of animals.

Lucy Foley studied English Literature at Durham and UCL universities. She then worked for several years as a fiction editor in the publishing industry - during which time she also wrote her debut, The Book of Lost and Found. Lucy now writes full-time, and is busy travelling (for research, naturally!) and working on her next novel.

Visit her Facebook page at www.facebook.com/LucyFoleyAuthor and follow her on Twitter @lucyfoleytweets

Val McDermid is a No.1 bestseller whose novels have been translated into more than thirty languages, and have sold more than sixteen million copies. She has won many awards internationally, including the CWA Gold Dagger for best crime novel of the year. She was inducted into the ITV3 Crime Thriller Awards Hall of Fame in 2009, was the recipient of the CWA Cartier Diamond Dagger in 2010. Val writes full time and lives in Edinburgh and the East Neuk of Fife.