In the Victorian era, 'A Great and Terrible Beauty' by Libba Bray stands out. It combines elements of magic and romance in a Victorian setting. Another one is 'The Agency' series by Y.S. Lee, featuring a female detective in Victorian London.
For the Renaissance period, 'The Borgia Bride' by Jeanne Kalogridis is a good choice. It explores the lives and intrigues of the Borgia family during that time. Also, 'The Birth of Venus' by Sarah Dunant offers a captivating story set in Renaissance Florence.