The map of the city is unlabeled, and in truth, probably not needed. The city is in the midst of moral decay. The hooks, and there are many, don't coincide to places on the maps - they are linked to personalities and events.
See, this isn't an adventure and to come to it with that expectation would leave the prospective DM frustrated. It's a series of hooks and story elements that can come together as a bigger picture, but the DM and the players are going to be the ones to put that together. It's a toolkit of sorts. A very disturbing toolkit at points.
Unless the DM is comfortable running game sessions from the seat of his pants, Verloren is going to need significant prep work, not the least of which is how the players react to the shift from normal city to one quickly decaying.
The big plot hook behind this all? Pretty interesting, and I'm not going to ruin the surprise.
Negatives? I already mentioned the virtually useless city map. As there really isn't much need for it (the DM may be well advised to possibly map out a very localized block or two for some of the hooks) being useless isn't so much a problem, but it would have been nice to have some locations / hooks labeled.
You need to watch the video to find out it's for adventurers 5-13 as it isn't spelled out at the RPGNow site.
Verloren is a city hanging in the balance. Either it will fall to an ancient evil or triumph based on your actions. Enclosed are city details, maps, nine original monsters, and interesting non-player characters for encounters in and out of Verloren. In this fantasy supplement, players will face powerful monsters and explore a decaying city to discover the secret of The Change and save the thousands of inhabitants.
9 Original Monsters
Over 20 Original Illustrations
3 New Spells
Lots of NPCs and Story Hooks