Hi there NoIdeaWhatToBelieve,
the Bible shows many bad decisions the people made...but they remained chosen for a long time...Can this be the case now? [With regards to the RC hearings]
This could conceivably be the case. However the organization has a history of mistakes and even willful deception spanning over 100 years. These errors, omissions and deceptions stack up over the decades and eventually one has to wonder on what conceivable basis God could have chosen the Watchtower organization.
Now as you mentioned the book 'Crisis of Conscience' would be a good place to start.
For the 607 BCE controversy 'The Gentile Times reconsidered' is a good read if you're into ancient archaeology and Watchtower biblical chronology.
For how the Watchtower organization derived its authority from the year 1918, 'Captives of a concept' is a good book. It goes into what the organization actually believed in 1918 and how Jesus could not have chosen the Watchtower organization at that time.