On My Radar:

Days That I'll Remember: Spending Time with John Lennon and Yoko Ono
by Jonathan Cott
Knopf Doubleday / Random House
Hardcover

From the publisher website:

Jonathan Cott met John Lennon in 1968 and was friends with him and Yoko Ono until John's death in 1980. He has kept in touch with Yoko since that time, and is one of the small group of writers who understands her profoundly positive influence on Lennon. This deeply personal book recounts the course of those friendships over the decades and provides an intimate look at two of the most astonishing cultural figures of our time. And what Jonathan Cott has to say and tell will be found nowhere else.