So far, I have yet to find a more useless d20 book. The whole book seems to be a collection of randomly generated maps.

The maps are typically a top down view with brief (and somewhat questionable) descriptions of what each item represents. The map quality is only passable at best and the descriptions are sometimes just plain silly.

After purchasing the book, I returned it and took the shipping loss. Don't make the same mistake... avoid this book!

Is this how the Double Diamond Triangle Saga functions? By lumbering noisily through every single plot point? This segment could be reduced to 20 pages, instead it's 96. Kern and Miltiades, so interesting in "Pool of Twilight", are here now reduced to squarejawed paladin stereotypes and are barely interesting. The way Piergeiron's illness is introduced is so amateurish that it seems like an afterthought. The tanar'ri subplot (since when does 96 pages allow suplots?) is incredibly dull, and our nominal hero is too klutzy for us to believe he would be sent on a rescue mission under any circumstances. And didn't anyone notice that a paladin dies solely because Kern's resistance to magic didn't allow Khelben to teleport him? Disappointing.