know him. that's what he left behind. >> i love the detail about being on a fruit diet deciding to name it apple. love the story behind the name. >> another interesting fact in the book too, a huge beatles fan. one of his wishes before he died, he wanted to get the beatles on itunes. if you want to hear more details about the book, walter will be on "good morning america" monday. but a fascinating read. >> we will all be tuning in and reading of course. coming up, touching moments from that last gop debate. >> to lady gaga's unusual serenade. our weekly friday rewind is coming up next. our weekly friday rewind is coming up next. lady gaga's unusual serenade. friday rewind is coming up next.