In Forever and a Duke, the Duke of Elsmore, a man who has multiple family members under his protection, discover that someone may be stealing from his estate. Needing help, but trying not to make it known to the rest of society lest it ruin his family, he turns to his friend, Quinn, the Duke of Walden. As a renowned banker, Quinn knows the importance of having clean books, and he asks his smartest auditor, Eleanora Hatfield to help Wrexham with his issue. Ellie knows, though, that titled gentlemen can be trouble, so wants to keep her distance from Rex, but it's difficult. Will they be able to solve the financial problems, without bringing the problem to the attention of the ton, or will their mutual attraction lead them to ruin?
I was a bit confused when I first started this book. I was expecting it to be about one of the Wentworth's and not the story of two secondary character's we came across in My One and Only Duke. Ellie's family have always been involved in scams and other schemes, and she's really quick with numbers. Wanting to go legit, she tries to open an account but no bank other than Quinn's will let her, and when she spots an error in an account, she's hired to audit the books. Rex is a duke, but he's also an owner in another bank, and though it would be expected that he and Quinn were rivals, they're actually tentative friends, but any hint of a scandal would ruin his whole family, and end the marriage prospects of his sisters. I liked the banter between Ellie and Rex a lot in this book. They were snarky with each other, but also open, and real, and it was nice to see their relationship blossom into friendship, first, before any romance came into play. The mystery surrounding the missing money was interesting too - even though I had an idea of who was to blame, it was still enjoyable to see the situation all play out and be solved.