Halo: Official Spartan Field Manual
From Halopedia, the Halo wiki
The Halo: Official Spartan Field Manual is a reference book on the Halo universe that was released on September 25, 2018.
The book is divided into ten sections: Introductions, the SPARTAN-IV Program, Physical Fitness Guidelines, History of the Spartan Program, ONI Augmentation Report, Battlefronts, Spartan Dossiers, UNSC Organization, Alien Factions, and the Spartan Armory. The book is written as an official guide for a new SPARTAN-IV recruit recently assigned into the UNSC Infinity, with additional info added by Spartans Gabriel Thorne and Tedra Grant.