Other than Valerie Bowman, who else wrote Regency romance novels? 
Valerie Bowman: Valerie Bowman is an author of historical romance novels, and specifically Regency romance novels. Regency romance: Regency romances are a subgenre of romance novels set during the period of the British Regency (1811–1820) or early 19th century. Regency romance:  These derive not so much from the 19th-century contemporary works of Jane Austen, but rather from Georgette Heyer, who wrote over two dozen novels set in the Regency starting in 1935 until her death in 1974, and from the fiction genre known as the novel of manners.
Georgette Heyer