Uncut Music Guide John Lennon 70th Tribute | Fab Forum | The Beatles Bible

This isn't a book, but it's better than quite a few books on JL. 

148-page magazine from Britain, no ads, cover to cover chronicle of JL's solo years with plenty of Beatle attention, too.  Came out a month or so ago, available at places like Borders, record stores, etc.

Vintage articles, interviews, photos, and album reviews from Melody Maker and New Musical Express, at least as good as anything Rolling Stone or the US press put out, often better.

The last page is a piece by Roy Carr, who knew JL starting in the Cavern days when both were struggling musicians and last saw him at the Dakota in about 1978.

This article is one of the best biographies of JL I've read, capturing him at key career and life moments and saying more in a few paragraphs than most authors do in hundreds of pages.  If you haven't checked it out, do so, I think you'll agree.