The Unknown Ajax by Georgette Heyer

In this engaging Regency novel, the story revolves around the unexpected heir to the noble but financially troubled Darracott family estate. The family is taken aback when they learn that the new Lord Darracott is a commoner from the army, with little to no refinement expected of a gentleman of his rank. As the family members, each with their own quirks and prejudices, conspire to make him fit into their aristocratic world, they are surprised to discover that the supposed uncouth soldier is not only more intelligent and competent than they initially thought but also harbors a few secrets of his own. Through a series of humorous and heartwarming events, the novel explores themes of family, class prejudice, and the true meaning of nobility. The 2817th greatest book of all time