Yoko Ono has compiled a tribute to John Lennon, to commemorate the 25th anniversary of his death.

Lennon's widow has collected written contributions from the singer's friends and family in preparation for the book. She also collected many celebrity tributes, including those from Mick Jagger, Ray Charles and Iggy Pop.

The book will be entitled Memories of John Lennon, and Ono explains her grief in the publication: "When John passed away so suddenly that night, I felt as though half of me fly away with him."