Tony,
I do hope all's well.
I am also intrigued and unable to find much abut the book (let alone a copy for sale)
There's a quite detailed description here about the book and author
Book: This detailed book provides a comprehensive account of fighting at the Chateau of Hougoumont on 18 June 1815, by utilising the accounts of the officers and men who fought at Waterloo. Drawn predominantly from contemporary manuscript sources, it contains a wealth of unpublished material including new information from French and German archives.
Author Biography: John Franklin is a professional military historian based in Switzerland who specialises in the Napoleonic period, and the Waterloo campaign in particular. A Fellow of the International Napoleonic Society (FINS), and a graduate of the University of Bern, he has been engaged in one of the most comprehensive investigations into the campaign ever undertaken, with the aim of providing a wealth of previously unpublished material. He is the author of acclaimed books of Waterloo correspondence on the Hanoverian and Netherlands armies, and has acted as historical consultant on the BBC Production entitled: Waterloo - The Soldiers' Stories.
These threads on TMP, particularly the personal response by the author, is very illuminating
Looks like there's much in the way new French material as well as from the Allied perspective:
http://www.napoleonicwarsforum.com/viewtopic.php?f=43&t=3181
http://theminiaturespage.com/boards/msg.mv?id=409385
http://www.napoleonicwarsforum.com/viewtopic.php?f=43&t=2442&start=150
May be available from Blackwell's or Waterstone's
Very best wishes
A