A book on long range shooting?
I'd suggest reading "Modern Exterior Ballistics" by Robert F. McCoy until you understand it. It will give you a fair understan'llding of how bullets fly though hte atmosphere. About 1000 shots fired in careful practcie, preferably with a skilled instructor, would be less time consuming though and would make you a better shooter.
I'm sorry, but I don't think yoiu can learn to be good shooter just from reading a book. I doubt you can learn to be good machinist or surgeon by reading a book either thouugh reading the right books will help with those endevours too.