I have read both books. I am great friends with the author Timothy Ballard, and he is a phenomenal researcher. I must let you know that "The American Covenant" was written for the LDS audience, and his newest book "The Covenant" promoted on the Glenn Beck programs was written for those outside of the Church. Also, Tim is encouraging many to read "The Harbinger" by Rabbi Jonathan Cahn, because that book and it's message also talks and teaches about this same great "Covenant" the God has made with America, and the condemnation that we are under for not keeping our part of that "Covenant."
Tim's first book that was released last October of 2011 was read by Elder Ballard. After reading the book Elder Ballard asked for Tim to meet with him. He did so, for a three hour visit. Elder Ballard said "that every American needs to read this great book, and counseled Tim to write another copy without the LDS doctrine in it for the main stream, and that through that endeavor it will become a missionary tool." Tim complied, and the doors have been opening up for him. I promise you and everyone else you will not be disappointed, and these works will help wake up those that are in slumber. Tim also teaches what we must do as a Nation to renew that Covenant before it's too late, and the full judgements come upon us!