Picked up a copy on Tuesday, and I'm about half-way through. The Norn set-up/backstory is excellent, but too much (thus far) is left unsaid, and is hardly even implied when it comes to other characters/races. The changes in how one reacts/views another changes from moment to moment, to the point that parts aren't believable due to the lack of background. You "hear" the characters say one thing, but their actions say the exact opposite
After finishing, I plan to go back and re-read "ghosts of ascalon", but so far I prefer that book to this one.
That being said, I do enjoy the danger/formiddableness bestowed on several creature types that gets lost on those of us who haven't faced some of these creatures with any trepidation in some time. There also seems to be a lot of overall setup that will lead into the actual gw2 game and the story at hand. Better to read ahead of time in book-form than quickly skimming an instruction manual/wall of in-game text as you set up your first character(s).