I don't want to discourage you, but if you know the subject matter and are inclined to work on a book, you should just write your own from scratch as the sole author: the normal way most books are written.
(I personally wouldn't write a book about the shell. I would be too paralyzed by the thought that at any moment, Stéphane Chazelas might crack it open.)
(I personally wouldn't write a book about the shell. I would be too paralyzed by the thought that at any moment, Stéphane Chazelas might crack it open.)