A Vaisakhi in Versailles (Charlotte Holmes #8)

The Kensington Quartet; Four Charlotte Holmes mysteries set in Europe during the Great War - Book 4 of 4.
A VAISAKHI IN VERSAILLESEUROPE - 1918.The Great powers convene in Versailles to decide the fate of Germany and Charlotte attends, with Dr Watan, as a delegate to assist the British envoy in the negotiations.
Complications arise when the conference is disturbed by the appearance of Princess Anastasia, the last remaining Romanov, who asserts her right to be recognised as the head of the Russian state.
Our investigators are tasked with proving her identity whilst dealing with the return of Prof. Schaeffer, their arch nemesis from Munich, who is advising the German delegates.
Branwell returns to India with his family and is charged by the Maharajah of Lahore to take his grandson to the Golden Temple in Amritsar for anointment as heir. Secret agents are plotting to kill the would-be heir and Branwell must use all his guile to outwit them.
Little do they realise they are travelling to a rendezvous with history, a spark that will consume the Empire.

Revenge lights the fuse for continued European conflict and the demise of the British Raj.