Yoko Ono’s Season of Glass cover is one of the most famous photos of the 20th century

Yoko Ono’s Season of Glass cover was widely condemned as in bad taste.

It shows the glasses pulled off John Lennon's face after his assassination in December 1980 .

The photo is exploitative, but it is art, and to everyone apart from Lennon , Ono was an alien too.

Her friend David Sheff has written a biography in close collaboration with Ono .

Yoko is a lens through which to understand Lennon ’s psychology.

He called her mother: he’d always been looking for his mum.

Lennon saw it as growing up: the old gang was over.

It is common for rockstars to get together with second wives who don’t know or care very much about their bands it is a way of escaping themselves.

The real zinger in the Yoko Ono story is that she got together with the couple’s interior designer, moved him into the apartment and stayed with him till 2000 .

Sam Havadtoy was always kept quiet: it didn’t look great for the grieving widow to have paired up with someone else so soon.