Whistleblowers are both celebrated and reviled. They expose illegal or unconscionable actions by a government official or organization, the dangerous practices or financial fraud of a corporation, or the perjury of a high-profile witness. The reasons that motivate whistleblowers are as diverse as the crimes and misdeeds they expose. Through articles written at the time of events, this book introduces readers to some of the most famous whistleblowers in recent history. These include Mark Felt, aka "Deep Throat," whose information helped uncover the Watergate scandal; Chelsea Manning, who, as Bradley Manning, shared classified documents revealing unsavory, untruthful, and potentially illegal activity by the United States government in the Middle East; and Grigory Rodchenkov, the doctor who exposed Russia's state-sponsored doping program.