The Holiday of a Marquess (The Holidays of the Aristocracy #3)
Linda Rae Sande

When widower Edward, Marquess of Delton, discovers his man of business has been embezzling, he escapes to the Soho Club with the marquessate's ledgers, determined to learn how much damage has been done. During breakfast, a fellow peer's recommendation has Edward seeking Elaine's help. In exchange for a review of his ledgers, he'll read and interpret the will.
Over the course of a single day and night, the Soho Club will cast its spell on these two lonely souls as they share their secrets, learn new ones, and allow the magic of the season to create one of their own.