S.K. Ahluwalia's book, Socio-Political Trends in Indian Nationalism, analyzes the development of Indian nationalism, focusing on the period around the 1930s and the influence of Gandhian ideology and British policy. The book likely explores how various political, social, and economic factors coalesced to create a unified national identity in the struggle against British rule, with a particular emphasis on events like the Karachi Congress of 1931.