A monster book with more.
Many of the most frightening creatures we know today have their roots in Victorian literature and history. Dracula, Carmilla, Jack the Ripper, Half-human mutants, cults. All can be found in the pages of Victorian origin.
More than just a monster book (though it is that as well), this presents some "history" behind the monster. I am reminded of some the more detailed Monster Hunter guides I have seen for other games.
There is so much here that it is difficult to quantify it all. But there is a lot and a lot of it is very, very good.
The stats are all d20, but the backgrounds work for any game.
All the Imperial Age books are all well written and features art from the age, either public domain art and paintings as well as some original art. In all cases the art is very evocative of the time and very well done.
The books are all easy to read, with clean layout and font sizes. They can be printed with ease without killing your printer cartridge.
[5 of 5 Stars!]