Eventually finished the 3rd and final volume of this magnum opus about one of my favourite British authors, whose life - far from perfect - is just as fascinating as the best of his fiction. It seems that there can't be much more to write about Greene ! I've re-read several of GG's novels over the past few years and doubt I will fully re-read this biography but will undoubtedly dip into it again and again to look something up.
One very minor quibble; considering how much detail Sherry goes into about nearly all of Greene's books, it is odd that there is no mention at all of Doctor Fischer of Geneva ( or the Bomb Party ), his 1980 novella.

Lordy, Lordy, has anyone ever written more pages about a writer than Sherry has done about Greene? I have finally finished all three volumes and I’m exhausted. 2200 pages of exhaustive detail will leave one in that state.

(March 10, 2022): I have to confess that I had read this enormous tome hurriedly (a lot of skimming) a year ago. So, this year, I read it again more carefully. My first analysis a year ago was correct. I kept yelling: "Editor, editor!!" Did I really want to know about 500+ pages of the death of his love affair with Catherine Walston? No, I did not! It could have been covered in about 10 pages quite adequately. At the end, Sherry seems to run out of steam (I'm not surprised) and leaves the response to Greene's death nearly entirely uncovered. OK, I'm done. I promise never to read this again.

Not as strong as vols. 1 and 2, this puts the cap on the fascinating life of Graham Greene and gives some odd insight into his biographer's participation in Greene's last years. Loved the series; glad it's done.