In reply to Dominic Green:
Hi Dom,
There are some very short clips online if you search 'Premier de Cordée film 1944' and there was a more recent adaptation of the book in a 1999 film. I've been in touch with Roger's daughter Martine and could ask if any digital copies exist, if you like?
Yes, I think Frison-Roche was less well-known as a climber (but who could blame him with all the other stuff he did!) and fiction is probably a deterrent for some people (I'm not a fan of fiction, either). This book is more 'autofiction' though.