Marksmanship Fundamentals is an audiobook written by an active-service Tier 1 operator and covers the fundamentals of long-range marksmanship.
The book was primarily written for beginner and intermediate-level shooters; however, even experienced shooters may benefit from the book. The fact is, if you are very good at the basics (the fundamentals), long-range shooting becomes relatively easy. The marksmanship fundamentals are the foundation of accuracy and precision and their mastery should be a focus of your training.
Some of what is covered in this audiobook:
Achieving accuracy and precision
Influencing factors: environmental, ammunition, rifle, optic/scope, shooter ability/marksmanship
Shooting position checklist
Conventional shooting positions
Unconventional shooting positions