Technically, this is a forum, not a newsgroup, Henry. But no worries.
As for uploading books: go to the book upload section. Start a thread in the appropriate section. Follow the title convention. (Author surname, forename: title, v1, date - if you get that wrong then some mod will correct it, so don't fret about that.)
In the thread, give a brief description of the book.
Then click "Manage Attachments" and follow the instructions to upload the book. It is very similar to adding an email attachment. If I can do it, then anyone can. But if any problems arise, then just contact a mod.