Well, 'Uprooted' by Naomi Novik is an excellent enemies to lovers fantasy novel. The main character and the wizard start off at odds but their relationship evolves in an interesting way. Then there's 'Red, White & Royal Blue' which, while more contemporary, has a bit of that enemies to lovers feel in a political context within a fictional world. And 'An Ember in the Ashes' by Sabaa Tahir also has a relationship that begins as enmity between the two main characters and gradually turns into something more.
One great 'enemies to lovers' fantasy novel is 'A Court of Thorns and Roses' by Sarah J. Maas. It has a great build - up of the relationship between Feyre and Rhysand. Another is 'The Cruel Prince' by Holly Black. The dynamic between Jude and Cardan is full of tension and eventual love. Also, 'Shadow and Bone' by Leigh Bardugo has some elements of this trope as well.
The 'Shadow and Bone' trilogy by Leigh Bardugo has elements of enemies to lovers. Alina and the Darkling have a complex relationship. At first, Alina sees the Darkling as a powerful and somewhat menacing figure. But there's also an attraction between them. The Grishaverse setting, with its magic and different factions, makes their relationship journey even more interesting.
A good example is 'Wuthering Heights' by Emily Bronte. Heathcliff and Catherine have a complex relationship that starts with a sort of enmity. Heathcliff is treated as an outsider by Catherine's family, and their different social standings create tension. However, they share a deep, passionate connection that evolves into a tortured love. Also, 'Red, White & Royal Blue' by Casey McQuiston features Alex and Henry who are from different worlds (America and Britain) and initially have a sort of rivalrous relationship which then blossoms into a beautiful romance.
One great example is 'Attachments' by Rainbow Rowell. It has an online aspect where the main characters start as sort of enemies in a work - related online environment. Lincoln, the IT guy, has to monitor the employees' emails for inappropriate use. Beth and Jennifer are two employees who often send emails that Lincoln reads. At first, he seems like an enemy invading their privacy, but as he gets to know them through their emails, he falls in love with Beth. It's a really sweet story that shows how an online connection can transform from something negative to a romantic relationship.
Some excellent 'enemies to lovers' fictions are 'Cruel Prince' by Holly Black. Jude and Cardan are enemies in the faerie world. Jude is a mortal living among the faeries and Cardan is a cruel prince who bullies her. But over time, their relationship changes into something more passionate. 'The Cruel Prince' shows how power dynamics and initial hatred can transform into love. Also, in 'The Vampire Diaries' book series (although it has a TV adaptation too), Elena and Damon start off as enemies. Damon is a vampire who seems menacing to Elena at first, but as the story unfolds, they develop a deep and complex relationship that has elements of love despite their initial enmity.
Character development is a big part. The characters have to change their initial negative views of each other. In a good 'enemies to lovers' BL novel, you'll see how they gradually start to understand and care for one another. For instance, they might discover shared traumas or interests that bridge the gap between them.
You could also check out 'Given'. Ritsuka and Mafuyu have some initial friction. Ritsuka is a bit cold towards Mafuyu at the start. But through their shared love for music, they grow closer and develop a deep, loving relationship.
A good one is 'Devil in Winter' by Lisa Kleypas. Sebastian, Viscount St. Vincent, and Evie are sort of enemies in the beginning. Evie is in a difficult situation and Sebastian offers a rather self - serving solution which she initially resents. But as they are forced to be in each other's company, they grow closer and their relationship turns into a loving one. These novels are great because they show the development from animosity to love in a historical context, with all the social rules and expectations adding to the drama.
One great 'enemies to lovers' romance novel is 'Pride and Prejudice' by Jane Austen. The initial animosity between Elizabeth Bennet and Mr. Darcy is palpable, with misunderstandings fueling their dislike. But as the story unfolds, they come to see each other's true natures and fall in love. Another is 'The Hating Game' by Sally Thorne. The two main characters are office rivals who constantly bicker and compete. However, beneath the surface, there's an underlying attraction that eventually blossoms into love.
Another good one is 'Wuthering Heights' by Emily Bronte. Heathcliff and Catherine have a complex relationship. They grow up together but are separated by class differences, which turns them into something like enemies at times. Their love is wild and passionate, and the story shows how their enmity and love are intertwined in a very dramatic way.
Another excellent novel in this genre is 'You Deserve Each Other' by Sarah Hogle. The couple in this book are on the verge of calling off their engagement. They seem to be enemies at this point, constantly arguing. But through a series of events, they re - evaluate their relationship and realize they are meant to be together. It's full of funny moments and heartwarming scenes.