Prior to the East India Company’s establishment in India in 1661, Islamic law was widely applied by the Mughal Empire. But as the Company’s power grew, it established a court system intended to limit Islamic law. Following the Great Rebellion of 1857, the decentralized Islamic legal system was replaced with a new standardized system. Islamic Law on Trial interrogates the project of juridical colonization and demonstrates that alongside—and despite—the violent displacement of Muslim legal sovereignty, Muslims were able to engage with and even champion Islamic law from inside the colonial judiciary. The outcome of their work was a paradoxical legal terrain that appeared legitimate to both Muslim practitioners and English colonizers. Sohaira Siddiqui challenges long-standing assumptions about Islamic law under British rule, the ways in which colonial power displaced preexisting traditions, and how local Muslim elites navigated the new institutions imposed upon them.