This book has the distinction of being the first Imperial Age book I bought.
These are optional, alternate occupations for d20 Modern characters. Though the background works for any game.
Not a lot of detailed material, but a lot of material all the same.
If you need a list of professions then this a good place to go.
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.