«The Case of the Love Commandos» by Tarquin Hall

In this contemporary Romeo and Juliet story set within India's caste system, private investigator Vish Puri faces his most difficult challenge to date - a high-stakes mystery involving one of India's most controversial commodities: love.
When Ram and Tulsi fall in love, the young woman's parents are dead set against the union. She's from a high-caste family, but her boyfriend is an untouchable from the lowest strata of Indian society. Young Tulsi's father locks her up and promises to hunt down and kill the 'lover boydog.' Fortunately, India's Love Commandos, a real-life group of volunteers dedicated to helping mixed-caste couples, come to the rescue. They successfully free Tulsi, but Ram has gone missing. The task of finding him falls to India's 'most private investigator.' Unfortunately, Vish Puri is not having a good month. He's already failed to recover the millions stolen from the First National Bank of Punjab; his wallet has been stolen; and worst of all, his arch rival, investigator Hari Kumar, is also trying to locate Ram. To solve the case and reunite the star-crossed lovers, Puri and his team of misfit assistants must infiltrate Ram's village and navigate the caste politics shaped by millennia-old prejudices.