In the period before the golden age of science fiction, there were authors who wrote this kind of fiction. I'm an unsure that I would actually categorize it as science fiction but that is how it is marketed. A man in the early 1920's is accidently hit by a ray and finds himself about 150 years in the future.
The writing is clean and moves fast. Knowledge from his time has been lost making him valuable. The Bolshevic revolution colors some of Shanks' vision of the future. This book is mainly important to see what was being written before the golden age of science fiction. It is sometimes funny that Shanks did not envision any changes in more than the technology of the future. After all, suffragists were active and had been for more than 40 years.