Sadhu On the Mountain Peak // Captain at Arms — Duncan MacNeil

Francis Fettleworth, divisional commander at Peshawar, knows only too well what a brittle thing the Pax Britannica has become on the Northwest Frontier, where his garrison is the last outpost of the Raj facing the Khyber Pass and the rugged Afghan hills. And trouble is brewing on an unprecedented scale among the Pathan warriors in that region. But if an officer could infiltrate their ranks, these dangers might be averted...

Being a spy is something James Ogilvie hasn't tried before. Disguised as an arms dealer he sets out across the Indus to talk his way into the confidence of the Pathan leaders and their fanatical holy men, the sadhu. Can he survive in this alien environment, a stranger to everything -- and everyone -- he holds dear? If he can't, the whole future of the British Raj may well be at risk...