Sherlock Holmes and the Power Principle

by Linda Stratmann

Sherlock returns in a puzzling new adventure! Perfect for fans of Sherlock Holmes, Arthur Conan Doyle, Anthony Horowitz and classic crime fiction.

All that glitters is not gold…

1878

Sherlock Holmes and his good friend Mr Stamford are close to completing their education at London’s St Bartholomew’s Medical College, and Holmes is keen to begin a serious career as a detective.

So when a solicitor contacts him about a new case, he quickly accepts.

Mr Ineson is concerned for his client, the widow Mrs Beauregard, who is considering investing most of her considerable assets in a new company called Baumann Motors Ltd.

In an age of industry, machines are rapidly transforming the Victorian world, and fortunes can be made – or lost – by speculating on the latest enterprise.

The Baumann motor promises to change the world transport, make manufactured goods cheaper and allow trains to run without the need for coal.

But it has not been tested, and Ineson is worried that Mrs Beauregard has fallen for the charm of its inventor.

Holmes and Stamford attend a demonstration under the pretence of being interested in investing to try and discover if the motor is as miraculous as it sounds. But soon they are involved in an even deadlier mystery…

With Holmes’ reputation as a highly intelligent and intuitive detective at stake, can he discover the truth about the highly secretive company? Or will this case prove too challenging for even the most astute of men?

SHERLOCK HOLMES AND THE POWER PRINCIPLE is the nineth Victorian crime thriller in the Early Casebook of Sherlock Holmes series.

THE EARLY CASEBOOK OF SHERLOCK HOLMES
BOOK 1: Sherlock Holmes and the Rosetta Stone Mystery
BOOK 2: Sherlock Holmes and the Explorers’ Club
BOOK 3: Sherlock Holmes and the Ebony Idol
BOOK 4: Sherlock Holmes and the Persian Slipper
BOOK 5: Sherlock Holmes and the Legend of the Great Auk
BOOK 6: Sherlock Holmes and the Duelling Dukes
BOOK 7: Sherlock Holmes and the Mycroft Incident
BOOK 8: Sherlock Holmes and the Cabinet of Wonders
BOOK 9: Sherlock Holmes and the Power Principle

229 pages, Kindle Edition

Published August 22, 2025

About the author

Linda Stratmann is a British writer of historical true crime, biography and crime fiction.

Reviews

[Mary · Rating 5 out of 5]

I must admit that when I started this book, I really didn't think it was going to be all that interesting. I persevered because it was the 9th book in a series that I had immensely enjoyed, and wow, was I surprised. I was absolutely riveted by the story. While the premise was based on a seemingly magical machine, the mysteries were so much more than I had expected. Complex mysteries, intricate pacing, interesting characters, and so many twists held my attention like few recent books have done. Ms. Stratmann has done it again, and while I have the feeling this might be the last in the series, I am hoping for many more. Well done! Very well done!

[Susan · Rating 4 out of 5]

1878 Holmes has a new case, investigating a new company, Baumann Motors Ltd and their new invention. Employed by solicitor Mr Ineson on behalf of his client Mrs Beauregrad, a wealthy widow who wishes to invest in the venture.
An entertaining and well-written Holmes mystery with its likeable main characters. Another good addition to this enjoyable series.