Even though Lyndon Johnson's presidency was in many ways scarred forever by the war in Vietnam, and destroyed in a lot of ways, he - as a character - was even larger than his presidency. Being able to get to know him well, that firsthand relationship with this large character, I think is what drew me to writing books about presidents.

When I do research, I have done - 90 percent of my time is the research, the other ten percent is the writing. So I don't have to face a blank piece of paper. I can look at this as a quote that I have from somewhere.

I think confidence comes from doing something well, working at it hard, and you build it up. It's not something you're born with. You have to build the confidence as you go along.

I'd like to think that what my style of writing is, is an attempt not so much to judge the characters that I'm writing about, to expose them, to label them, to stereotype them, but instead to make them come alive for the reader with all their strengths and their flaws intact.

What interested me most about the Kennedys was the family situation. Somehow, they had created this family that lasted over time, they had a sense of connection to one another. Especially now, when people are spread all over the country and they don't see grandparents and parents, this family bonded together.

Lyndon Johnson is still the most formidable, fascinating, frustrating, irritating individual I think I've ever known in my entire life. He was huge, a huge character, not only standing six feet four, but when you talked to him, he violated the normal human space between people. He was a great storyteller. The problem was that half his stories, I discovered, weren't true.

Sometimes people will find things that are wrong. Sometimes they will even find an approach that you took wrong. If you think you took the right approach, then you just absorb the criticism, but you don't change your mind.