Instrument Flying Handbook (Federal Aviation Administration)

This is the FAA's official primary pilot resource for instrument flight rules and training, with chapters on flight instruments, navigation, emergency operations, and much more.
It covers everything pertinent to operating an aircraft, both in instrument meteorological conditions (IMC) and without reference to outside visuals, relying solely on the information gleaned from the cockpit. Information applies to both analog and electronic flight displays and is organized into separate coverage of the traditional and pictorial displays.
Instrument Flying Handbook includes chapters on:
National airspace systemThe air traffic control systemHuman factorsAerodynamics,Flight instruments,Flight maneuvers for IFR operationsNavigationEmergency operations,Helicopter operationsAnd more.
Advanced systems are covered, including flight management systems, the primary flight display (PFD) and multi-function display (MFD), synthetic vision, and traffic advisory systems. Instrument clearance shorthand is discussed, and an instrument training lesson guide is provided.
The Instrument Flying Handbook is designed for use by flight instructors, pilots preparing for the Instrument Rating FAA Knowledge and Practical Exams, and instrument-rated pilots looking for a refresher or preparing for an Instrument Proficiency Check (IPC). This edition features with full-color illustrations and diagrams, along with a comprehensive glossary and index.

The Federal Aviation Administration is the national aviation authority of the United States. It regulates and oversees the aviation industry, pilot licensing, and airspace with the goal of providing "the safest, most efficient aerospace system in the world."