Lovejoy

This series features an unscrupulous and somewhat unlikeable antiques dealer named Lovejoy who leads a shady and often marginal existence in spite of his apparently unique psychic gift of being able to infallibly determine whether any work of art or antique is genuine or not. For this talent he is called, both by himself and many of the other characters in the books, a "divvie", slang for diviner. Aside from this single paranormal element, however, the books are straightforward mystery thrillers, not speculative fiction. For more information see the Wikipedia article.