Sure. Google and Yahoo both offer free web and mail-list groups. Delphiforums has good web-based forums, some of which are free but they want you to upgrade. I've made several but never followed up on them much. It's a lot of work maintaining a forum and I had other things to do, mostly maintain my website.
Generally, I've found that you need some kind of special draw to make a forum successful. That can be paying for a professional platform, being in business like Amazon or putting in a lot of free content.
"It's a lot of work maintaining a forum and I had other things to do, mostly maintain my website. " You and me BOTH - my sites take a lot of time, as does writing.
I was thinking more of a self-policing group. Someone sets the thing up - others join, then "You do mine I'll do yours" type of thing.
"...some kind of special draw to make a forum successful." Draw would be experienced eyes going over your material - even if it's only, say, the first chapter. hmmmm what else could a draw be? Perhaps an invitation to the thing itself could be a draw. Pick only those with good reviews? Dunno. Too new at this.
A draw for me would be books to read! I never have enough, ever. I read like a speed freak.
I wouldn't think we'd upload anything whatsoever - we'd share books via email. (Gotta be safety-conscious) Any old free forum would do really. Delphiforums? Will look into (if there's any interest.) Would rather someone else did the setting up - but I'll do it if need be. Again, depending on the interest - which we'll see by responses here.