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 100 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, over 20 plays, and six novels written under the name of Mary Westmacott.

Alyssa Cole is a New York Times and USA Today Bestselling author of romance, thrillers, and graphic novels. Her Civil War-set espionage romance An Extraordinary Union was the American Library Association's RUSA Best Romance for 2018; her contemporary rom-com A Princess in Theory was one of the New York Times' 100 Notable Books of 2018; and her debut thriller When No One Is Watching was the winner of the 2021 Edgar Award for Best Paperback Original. Her books have received critical acclaim from the Washington Post, Library Journal, Kirkus, BuzzFeed, Book Riot, Entertainment Weekly, and various other outlets. When she's not working, she can usually be found watching kdrama with her husband or wrangling her pets.

Lucy Foley is a No.1 Sunday Times, Irish Times and New York Times bestselling author, whose contemporary murder mystery thrillers have sold over five million copies worldwide. She is a Waterstones Thriller of the Month author, a three-time nominee at the British Book Awards, and The Guest List was a Reese's Book Club pick. As a lifelong Agatha Christie fan, Lucy has also contributed to Marple, a collection of short stories featuring the legendary detective.

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.

KATE MOSSE is the international No.1 bestselling and award-winning author of thirteen novels, six works of history and memoir and five plays, and Founder Director of the Women's Prize for Fiction and for Non-Fiction.

Twenty years ago, Mosse's game-changing Grail adventure, Labyrinth, became a multi-million-copy global bestseller. Translated into thirty-eight languages and adapted into a Ridley Scott television series, its conspiracy story, interwoven with a captivating slice of French history, helped readers fall in love with Carcassonne. Borderlands is her first medieval/modern timeslip novel since Labyrinth, introducing readers to le Mont Saint-Michel on the eve of the Norman Conquest of England and the present day.

Awarded a CBE in the King's New Year's Honours List 2024 for services to literature, women and charity, Kate Mosse is a visiting professor of Creative Writing & Contemporary Literature at the University of Chichester and a Trustee of the British Library.