G. K. Chesterton 
The Wisdom of Father Brown [EPUB ebook] 

Criminals beware—there is no eluding the extraordinary mind of Father Brown
Dr. Orion Hood is one of the eminent thinkers of his day, a psychologist whose expert opinion on human nature is sometimes sought by the police. Usually, he is called on to solve only the most spectacular crimes—a nobleman murdered, a diplomat poisoned—but today a more ordinary problem presents itself. An amiable little priest named Father Brown asks Dr. Hood to help a young couple whose families do not want them to marry.