The Truth About the Duke Books in Order

The Truth About the Duke is one of Caroline Linden's most satisfying family-set series because the romance in each book sits inside a bigger problem that will not go away. The de Lacey family is thrown into chaos when an old marriage scandal calls the Duke of Durham's line into question. Suddenly inheritance, legitimacy, and even the future of the dukedom are up for debate. That legal knot gives the whole series momentum from the first page.

There is also a prequel, I Love the Earl, set a generation earlier. It follows Margaret de Lacey and Rhys Corwen, and it adds warmth and family texture before the main trilogy begins. By the time the later books roll around, the de Laceys feel like a real clan, not just a set of names arranged for convenience.

The main trilogy then follows the three de Lacey brothers. One Night in London belongs to Edward, the serious son caught between family duty and a bargain with Francesca Gordon, a widow determined to protect her young niece. Blame It on Bath gives the spotlight to Gerard, who thinks a sensible marriage will solve practical problems until Katherine Howe proposes exactly that and makes the arrangement far less simple. The Way to a Duke's Heart follows Charles, the most pleasure-loving of the brothers, as blackmail and suspicion force him to deal with a future he has long tried to avoid.

Everything is personal here.

That is what makes the series work so well. The inheritance scandal never feels abstract. It changes how the brothers see themselves, how they move through society, and what sort of marriages seem possible. Blackmail is not just a thriller element. It is tied to old mistakes, family secrecy, and the fear that a name can be taken away. At the same time, the heroines are never just witnesses to the de Lacey drama. Francesca, Katherine, Tessa, and Margaret all bring their own needs, intelligence, and sharp edges to the story.

The tone sits in a sweet spot between tender romance and page-turning mystery. There are solicitors, newspapers, vanished children, compromising bargains, and plenty of emotionally messy siblings. London is important, but so are Bath, country estates, and the private family spaces where people drop their public masks. If you like your historical romance with an ongoing family arc, real external stakes, and couples who have to work through more than simple attraction, this series delivers.