The Sadhu: The Silent Ones #1 (2007)

In the 19th century, when the sun did not dare set on the British Empire, James Jensen went to India as a soldier in the Her Majesty's Army. Losing his family to betrayal and violence, Jensen became a SADHU, a True Warrior who must embrace the spiritual path to salvation. Now an emptiness rules James Jensen's heart, and he wanders aimlessly. His travels bring him to the Kumbh Mela, a truly epic gathering of mystics, where deadly enemies and shadowy allies lie in wait. But even that's not the biggest surprise, as James learns that a loved one might indeed still live.