Private India by James Patterson and Ashwin Sanghi

In Mumbai, seemingly unconnected people are dying, strangled in a chilling ritual and with strange objects carefully arranged with the corpses. For Santosh Wagh, head of Private India, the Mumbai branch of the world’s finest investigation agency, it’s a race against time to stop the killer striking again. In a city of over thirteen million, he’d have his work cut out at the best of times, but this case has him battling Mumbai’s biggest gang lord and a godman who isn’t all he seems.

And then he discovers there may be an even greater danger facing Private India. Hidden in the shadows is someone who could destroy the whole organisation – along with thousands of innocent Mumbai citizens…