"Oil!" is a 1927 novel by Upton Sinclair that explores the oil industry in California during the early 20th century. The story follows the life of a young man named Bobby Graves, whose father is an oil tycoon. The novel delves into themes of greed, corruption, and the impact of the oil industry on society and the environment. The book also highlights the struggles of labor movements and the fight for workers' rights, particularly through the character of Union Oil. Sinclair uses the narrative to critique capitalism and the moral dilemmas faced by individuals in pursuit of wealth.