Readers have selected the finest thrillers and mysteries of the 21st century, creating a definitive list that showcases diverse storytelling excellence. The backbone of the list features nine novels by Tana French, highlighting her exceptional contribution to contemporary crime fiction. Other standout authors include John le Carré with five novels, Kate Atkinson with five novels, and Mick Herron also contributing five novels each.

These authors represent the pinnacle of modern mystery and thriller writing, offering readers complex narratives and compelling characters. The list reflects a broad range of styles within the genre, from psychological thrillers to espionage mysteries. Readers' choices demonstrate appreciation for both established masters and emerging voices in crime literature.

The compilation serves as a guide for book enthusiasts seeking quality reads in the thriller and mystery genres. Each selected work has proven its staying power and critical acclaim over the past two decades.