If you think about it, the historian's task is like that of the detective.

Here is Theodore Roosevelt with all his faults and with all his strengths - the devoted family man, the passionate game hunter, the astute politician, the frustrated warrior. This is a deeply moving account of the last years of a very great man.

The more I have studied Lincoln, the more I have followed his thought processes, the more I am convinced that he understood leadership better than any other American president.

I love mysteries, and I read them every night before I go to bed.

In Lincoln's day a President's religion was a very private affair. There were no public prayer meetings, no attempts to woo the Religious Right. Few of Lincoln's countrymen knew anything at all of his religious beliefs.

Maybe I will write a memoir, perhaps I'll do some essays, or maybe I will write a mystery story.

I'm not sure Lincoln would fare well if he were a presidential candidate today.

At the beginning, Lincoln was so inexperienced he had reverence for military expertise, not realizing that there wasn't any military expertise, that the most anybody had commanded up to that point had been somebody, some troops in the Mexican War, and it had been years ago.