This article is from the Tom Holt FAQ, by Nick Boalch email@example.com with numerous contributions by others.
All that is asked is that posters maintain sensible netiquette. The
charter sets out guidelines for on-topic posts: basically anything to do
with Tom Holt, Tom Holt's works (novels, short stories, filks and so on)
and Holt-related fan activity.
The charter for alt.books.tom-holt is contained in the control message
that created the newsgroup, and can be found in a number of online charter
repositories (for example in ftp://ftp.uu.net/usenet/control/alt/), if you
want to read it in its entirety.