Love Letters by the Sea. Siren's Retreat Quartet, #4

A witty new enemies-to-lovers romance from a New York Times bestselling author: What happens when the proprietress of a seaside inn discovers the romantic charmer she's been corresponding with is the same villain turning her beloved hotel into a gaming hell? Find out in LOVE LETTERS BY THE SEA!When not responding to advice column letters, entrepreneurial widow Mrs. Deborah Cartwright runs bright, beautiful Siren's Retreat, legendary for helping her lovelorn guests find their perfect match.
Deborah experienced love years before, and lightning does not strike twice. Although there might be a light flirtation with a certain anonymous letter-writer she's definitely not falling for, there's no time for romance. Not whilst a heartless blackguard is in town to wrest her beloved inn out from under her!Clever, career-minded Mr. Patrick Gretham is the trusted man-of-business for a powerful lord, who is eager to turn this perfectly situated property wasted on lovebirds into a gambling hell the likes of which no one leaves with their fortunes intact.
Over Deborah's dead body! The beautiful proprietress hates everything Patrick stands for and will fight him every step of the way. Except when they find themselves on opposite sides of a plume. Or falling into each other's embrace.