Our colleague has passed away in autumn. He was active till the last days of his life; respectively, several texts of his authorship remain unpublished. We would like to publish them; yet the problem is that some of them are far from being finished (in particular, some of the sections currently consist of titles only).
I would like to ask the following: would you recommend us to publish these texts in their current form? If we will add some sections eventually, would it be fine to add co-authors to the corresponding texts (if the new sections would be really significant)? Do you know of any examples of dealing with a similar problem?
P.S. As far as I know, most of the texts in question are "book-like". Thus we don't have to submit them to any journals. And we would like to "act ethically".