Consulting, writing or rewriting: there are a thousand and one ways of contributing to a book.
"We're more than happy to ghost-write."
(Excerpt) "Does it pose a problem if they aren't specialists in the subject?
Just because we're not up for the Nobel Prize for Literature...
Countries of the European Union
(Excerpt) "Does it pose a problem if they aren't specialists in the subject? No. If there's something they don't understand, they say so, and that compels us to be more explicit."