R. Austin Freeman 
Adventures of Dr. Thorndyke [EPUB ebook] 

The Adventures of Dr Thorndyke features five short stories, each divided into two halves. In the first half of each, we get an inverted mystery set up, showing how some soul was led down a dark path to murder, and their subsequent steps to avoid detection. In the second half, the story completely shifts perspective, and we watch as series detective Dr Thorndyke applies scientific principles to uncover the truth.