One book that I intend to read very soon is David McCullough's latest, 1776. A few years ago, I borrowed a copy of John Adams, and was able to steam through it fairly well till I got near the end. I knew that John's wife, Abigail, was going to die, and I didn't want to read about that. It was a very vivid portrait of the emotional bond between them that was the centerpiece of the book for me.
Another reason that I love McCullough's writing is that he is able to draw me into subjects that otherwise would bore me. Case in point: The Great Bridge. McCullough pulls you into the worlds of engineers and politicians and laborers, showing all their faults, but with much affection toward their human nature. Great stuff.