The book 'Nation First : The Golden Saga of 82 Years' is the history of which one of the following organizations ?

The book titled 'Nation First: The Golden Saga of 82 Years' chronicles the history, sacrifices, and achievements of the Central Reserve Police Force (CRPF). It was released by the Union Home Minister, Amit Shah, in February 2021.

• The CRPF was originally raised as the Crown Representative’s Police on July 27, 1939.
• After Independence, it was renamed the Central Reserve Police Force following the enactment of the CRPF Act on December 28, 1949.
• The book details the force's evolution over eight decades, highlighting its role in maintaining internal security, managing elections, and its bravery during various conflicts and insurgencies.
• The "82 years" mentioned in the title refers to the period from its inception in 1939 to the year 2021, celebrating its long-standing service to the nation.