I'm a fan of John Dickinson Carr and other Golden Age mystery writer so locked room mystery means that there will be a body in a locked room, no way to access it but a murder took place. It's an impossibile crime in a locked room.
This is a thriller featuring a limited number of suspects, a tons of storylines and I enjoyed it as it kept me on the edge and I couldn't guess the twists or the culprit.
Entertaining, complex, a bit confusing at times.
Recommended.
Many thanks to the publisher for this arc, all opinions are mine