A fantastic guide for running a Victorian Age game. Plenty of background is given about societies, countries and people of the time. Quick overviews of Victorian thoughts on sex, the occult, and other countries can add plenty of flavor to any game. As well as Alternate-versions of the Victorian setting such as Steam-Punk, Horror, Supers and Alt-Reality.
On the d20 specific side of things, a number of feats are given to be used (but can easily become backgrounds or qualities, depending on what your game needs) and even some advise on converting "Thrilling Tales" Advanced Classes over to Imperial Age.
The advice given is quite good, but the book almost pays for itself in terms of the near complete list of weapons (in d20 format) used. There is a brief timeline and some references.
If you enjoy Victorian games like I do then this is a great product whether you play The Imperial Age, another d20 product or something else all-together.
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.