Looking for an objective book on the CIA, it’s influence on the world, and it’s operating methods

Hello! I’m looking for a book on the CIA, it’s influence and impact on shaping world events.

Everything I seem to find leans heavily in the “conspiracy theory” territory or its claims are disputed; I would love books that are more objective, based on declassified files / legal testimonies/ academic research etc. and the veracity of the claims made are generally accepted. Thanks!

by brotatochip75