Here's a list of all of Eden's novels that are out so far, along with a plot description. I've posted them in the order they should be read in, otherwise you will be missing out on some inside jokes from another book:
When Persephone Lancaster receives a marriage proposal from the ill-tempered Duke of Kielder, she refuses, and then reconsiders. The obscene sum of money he's offering Persephone would save her family from ruin. With her characteristic optimism, she travels to the far reaches of Northumberland to wed a greatly feared stranger. Lodged deep in a thick forest infested with wild dogs, the Duke's castle is as cold and forbidding as the Duke himself, a man with terrible scars on his body and his soul. But the Duke's steely determination to protect his heart at all costs is challenged by his growing attachment to his lovely and gentle bride. With caring persistence, Persephone attempts to pierce the Duke's armor and reach the man beneath. Yet he cannot tolerate such exposure, and his repeated rejections take their toll. But when grave danger arises, the Duke realizes he must face the risk of revealing his true feelings or lose the woman he cannot live without.
Harry Windover adores blonde, green-eyed Athena Lancaster, but alas, a penniless man like himself has no hope of winning a young noblewoman’s hand. To add insult to injury, Athena’s brother-in-law and guardian, the Duke of Kielder, has asked Harry to assist Athena in finding the gentleman of her dreams. But the lovesick Harry is cunning as well: as the weeks pass, he introduces Athena to suitors who are horrifically boring, alarmingly attached to their mothers, downright rude, astoundingly self-absorbed, and utterly ridiculous. Athena can’t comprehend why she is having so little success meeting eligible and acceptable gentlemen. Indeed, her circle of admirers couldn’t be less admirable — nothing like the loyal, gentle friend she’s found in Harry. But how long can Harry’s scheme be hidden before it is discovered? And what will Athena do when she uncovers Harry’s deception? Escape into a charming regency world in this delightfully romantic comedy of manners that will entertain you to the very last word.