"The Wicked Marquis" is a suspense novel by the master of the genre E. Phillips Oppenheim. The novel tells about an ancient feud between the rich marquis and his neighbor, which turns into a real detective. Long years ago, the marquis inspired his neighbor's daughter to leave her home and become a writer, leaving her father alone. Now, the estranged father wants to take revenge and seeks help. Yet, it may turn out that the marquis is not that guilty. Will he manage to avoid the danger? Will his enemy be in time to call the mercenaries back?