The Crusader

Brought to you by Penguin.

A priceless diamond. A deadly siege. A detective caught between a rock and a hard place

The new mystery novel from Ajay Chowdhury, for fans of Robert Galbraith and M. W. Craven

Detective Sergeant Kamil Rahman is riding high on newfound fame and a thrilling new case: the mysterious death of the Deputy Governor of the Tower of London.

Meanwhile ex-partner Anjoli’s luck is about to change too. Her struggling detective agency has been asked to investigate a series of death threats targeting a high-profile, and controversial, climate activist.

Unbeknownst to them both, rogue historian Rohan Gill is planning the ultimate heist—to reclaim the Kohinoor diamond from the Tower – and Kamil and Anjoli, are an integral part of his plan.

With the Tower locked down and tensions soaring, will Kamil and Anjoli find the strength to do what’s right, or will they be swept away by the tides of history?

Praise for the Detective Kamil Rahman series:

'Outstanding' SUNDAY TIMES

'Hugely entertaining' ANN CLEEVES

'A rip-roaring mystery that's engrossing from start to finish' ABIR MUKHERJEE

© Ajay Chowdhury 2026 (P) Penguin Audio 2026