"Gentile Times" is a very complicated read, but you'll learn a lot if you take the time to completely digest it. After COC, I recommend "In Search of Christian Freedom" the next best book for newly exiting dubs. This is is because the material is excellent, impeccably documented (as is COC), and presented in a calm and reasonable manner.
For dubs who want to exit but are still fearful that maybe, just MAYBE the WTS might be right about their "last days" interpretations, I recommend Carl Jonsson's "Sign of the Last Days - When?" After reading that book, you'll wonder how the society EVER was able to sucker people into thinking the very things Jesus said were NOT parts of the "sign" of the last days, WERE parts of the last days. He gives great statistics about earthquakes, famines, pestilences, and world wars throughout history that were far greater than anything that has happened since 1914.
Good luck fortune on your journey.
Farkel