Prima Guide

The Prima Guide refers to the official Guild Wars guide books published by Prima Games:
 * Guild Wars : Prima Official Game Guide (ISBN: 0761548904) Available in paperback as well as eBook edition.
 * Guild Wars Factions : Prima Official Game Guide (ISBN: 0761553835) Available as paperback edition only.
 * Guild Wars Nightfall : Prima Official Game Guide (ISBN: 0761554491) Note: Prima have withdrawn this, and any pre-orders by retailers are void. It's been stated by ANet that no strategy guide for Nightfall has been announced at all. (source).