These chapters had a lot going on so I will briefly describe what they were about.
vs 12-19 These chapters talk about Christopher Columbus and his discovery of the Americas
vs 28 The bible was changed to benefit the presiding church/ religion of the time
The Great and Abominable Church - some say that it was the Catholic church b/c it was corrupt, but I think that it's any religion that distorts the truthfulness of the God's teachings to benefit themselves. For example right now there are some Muslims who believe that a Jahid (sp?) is war for God but from what we are seeing it is only an excuse to go on a killing rampage and hide behind their religion.
Nephi sees the coming forth of the Book of Mormon and the Doctrine & Covenants
vs 2 - Nephi tells his brothers that "the guilty taketh the truth to be hard, for it cutteth them to the very center." - - this is b/c they know that they are being wicked and don't want to hear about it.
vs 3 - if you are doi g what's right you are not defensive and will listen to what is being said
vs 10 - Lehi finds the Liahona - this can be likened to the a modern day GPS system to help us find our way.