I'm looking for a fantasy novel with action and adventure, possibly with some romance. What would you recommend?

Based on your preferences for fantasy, action, and adventure with a hint of romance, "A Villain's Survival Guide" sounds like an excellent fit. The description indicates that the protagonist is reborn into the body of a doomed villainous character within a novel he once read. This premise immediately sets up a narrative ripe with action and adventure as he navigates this dangerous new world and attempts to alter his fated demise. The inclusion of romance as a tag suggests that there will be romantic subplots or developments woven into his struggle for survival. The unique angle of playing a villain trying to survive, rather than a traditional hero, offers a fresh take on the genre.

Another strong contender, though with a slightly different focus, is "Evading the Hero’s Party with Full Effort." While its primary tags lean towards action, adventure, and comedy, the potential for romance is present, especially given the 'Harem' tag, which often implies romantic entanglements, though not necessarily exclusive. The premise of the protagonist actively trying to avoid a hero's party, while they mistakenly believe he likes them, creates a humorous and potentially romantic dynamic. The blend of action and the unique situation of avoiding conflict could lead to unexpected romantic developments. Both novels promise engaging plots with the elements you're seeking.