Barbara Greene

As far as I can see, Too Late to Turn Back is Barbara Greene's story of some of the events Graham Greene told in Ways of Escape. But to say that the later contains the former seems wrong. Retelling of might be better. Any other opinions?

"Is a reply to" maybe? Or "Is a supplement to"

I kinda like the "reply" one though. Definitely not contains - unless the text of the other book is inside of this one, it cannot be contains.

I like "retelling"