Regency romance by a good author. Like all Signet Regencies, it is written after the Georgette Heyer style. Based on info about the Grand Tour typical of that era.
From the cover:
John Haverfield, the Marquess of Vare, was in no hurry to take a wife -- and certainly not one like the tomboyish, outrageously independent, thoroughly intractable young Lady Laura Lockridge.
For her part, Laura wanted no part of any man -- certainly not one like the maddeningly self-assured and insufferably arrogant marquess.
But journeying over dangerous roads and through mazes of intrigue in Italy, far from the safety of London's social rules, this perfectly mismatched pair of titled travelers found themselves forced to pose as newlyweds -- on a honeymoon that tested to the breaking point the vows of both of them never to love, honor, or obey. . .