If the Scientific Detective book allows you make Holmes, and Monster Hunter make (a younger) Van Helsing, then this book allows you to make a Victorian fantasy Tesla.

If you are looking to turn The Imperial Age into a more Steam Punk style game, then you need to start with this book.

Plenty of new feats are included to allow your Victorian Weird Scientist to make their inventions.

Outside of the d20 realm this book is also a great guide for any sort of weird/super science for the Victorian Age. While specifically that, it is a great start.

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.