. >> mike: robert caro spent over half is like telling a story of lyndon johnson.00 pages. but he's only up to 1964, not you have to vietnam. he took us into his office. >> this is the outline of the rest of my last volume. from here, they are coming to the end of the book over there. >> if you should be unable, for whatever reason, to finish the book, have you made provisions for somebody else? >> no, i've made provisions that nobody else can finish my book. nobody is going to publish anything with my name on it that i didn't write. not a word. >> i might not be as good, i might not out sing everybody, i don't know, i meant in the world, but i'm going to outwork you. >> at age 58, toby keith has slowed down. instead of 200 shows a year, he now does 50 and he says his music is not what sells now. >> it's more of a hip-hop country. kids make a half a billion and end up on farms. i made mine, but i'm not going to write that stuff. >> but if our staff at "fox news sunday" is any sign, he still has his fans. and his music, while, that will last forever. ♪ >> will raise