This is a stand-alone adventure, which can be dropped with ease into a suitable location on your campaign world. As such, the background is comprehensive yet flexible, and includes several possible ways in which to get your characters involved. There are a few grammatical errors that a good proof-read should have caught, but little that actually makes it difficult to understand - they just make the teacher in me reach for a red pen!
Once begun, the action is swift and dramatic, with the dragon Deathcloud attacking the elf city the characters are (for whatever reason) visiting. Their aid is soon enlisted to deal with the matter and this involves an exploration of a mostly uninhabited forest. There are plenty of interesting folk to interact with during the course of investigations and enough red herrings to keep characters busy, yet the real trail is not too hard to follow without you having to make it too obvious - neat!
And of course, there is the climactic final encounter with Deathcloud herself. The setting itself is innovative and challenging and it is recommended that you make a 3D model to make this clear to your players... it can get a bit complex for those who like battlemaps for major fights, but it should suit my somewhat looser style of running combat well. It has great potential for a cinematic battle against a memorable foe.
Overall, a nicely-concocted mid/high level adventure - the dragon is CR13, and the adventure as a whole is aimed at 10th-11th level characters - with plenty to do and a real feel of being the heroes!