There are many fantasy books that include elements of both medieval and romantic themes. Here are a few examples:
"The Wheel of Time" series by Robert Jordan: This epic fantasy series features a medieval-inspired world with a complex system of magic and a rich history. The series also includes romantic subplots between several of the main characters.
"The Selection" series by Kiera Cass: Set in a dystopian future where a group of young women compete for the heart of a prince, this series combines elements of both fantasy and romance.
"The Black Jewels" series by Anne Bishop: This dark fantasy series features a medieval-inspired world with complex political intrigue and a focus on the relationships between the characters, including several romantic subplots.
"A Song of Ice and Fire" series by George R.R. Martin: This epic fantasy series, which inspired the HBO series "Game of Thrones," is set in a medieval-inspired world and features political intrigue, complex characters, and several romantic subplots.
"Outlander" series by Diana Gabaldon: This historical fantasy series combines elements of both romance and fantasy as it follows the story of a woman who travels through time to 18th century Scotland and becomes embroiled in the Jacobite risings.