Here's kind of an oldy, but still very much a standard for any shooter's library. Warren Page, one of the best known bench rest competitor's (with good reason, he was a tournament winner in his 2nd year of competing and continued to turn in top performances for years). Warren goes into detail here on how a rifle functions and what it takes to make the rifle as close to a "one hole" shooter as possible. Written in 1973 and published by Winchester press, Warren covers every aspect of rifle accuracy and mechanics.