Recommend some summer 2021 romance novels.

An underrated one from summer 2022 is 'The Soulmate Equation'. It has an interesting concept of a genetic matchmaking company. The relationship between the main characters develops in a really sweet way. 'The Unhoneymooners' is also underrated. It has a great enemies - to - lovers story set against the backdrop of a honeymoon. The banter between the characters and the development of their relationship is really engaging. And 'To Love and to Loathe' is another underrated gem, with its great chemistry between the two main characters.

One popular summer 2020 romance novel is 'Beach Read' by Emily Henry. It's a story about two writers who challenge each other to write in different genres while staying at neighboring beach houses. It has great character development and a sweet love story.

One great NPR summer romance novel could be 'The Hating Game' by Sally Thorne. It's a fun and flirty read with great chemistry between the two main characters. The banter and the slow - burn romance make it a perfect summer choice.

Well, 'To All the Boys I've Loved Before' is a well - known hot summer romance novel. It tells the story of Lara Jean and her love letters that get sent out accidentally, leading to a series of romantic events during the summer. Then there's 'Since You've Been Gone', which has a touch of mystery and a great summer romance. Also, 'The Unexpected Everything' has a wonderful summer setting with a cute romance story.

One great summer 2023 romance novel is 'The Beachside Love Affair'. It tells the story of two strangers who meet at a beach resort and fall in love. The beautiful beach settings add to the charm of their budding relationship.

One underrated summer 2019 romance is 'You'd Be Mine' by Erin Hahn. It focuses on two country music stars, one on the rise and one whose star is fading, and their relationship as they tour together. Also, 'The Bookish Life of Nina Hill' has a bit of an underrated romance aspect. It's mainly about a bookish introvert, but the romance that develops between her and a guy she meets is really sweet and understated.

I would recommend 'One Day in December'. It's a novel that starts with a chance encounter during the winter but the relationship develops over the summers. 'The Unhoneymooners' is also great. It's about two people who end up on a honeymoon together during the summer and their relationship blossoms. And 'Red, White & Royal Blue' which has a political backdrop but also a beautiful summer - time romance between the two main characters.

One popular summer romance novel is 'The Summer I Turned Pretty'. It beautifully captures the essence of summer love, with a young girl's experiences of love and friendship during the summer months at a beach house. Another is 'Beach Read' which features two writers who find love while spending their summers writing. And 'Second Chance Summer' is also great, it tells a story of family, love, and second chances all set against the backdrop of a summer.

Well, 'Call Me by Your Name' can be considered a great summer romance novel. It has that idyllic Italian summer setting which adds to the passionate love story between the two main characters. 'To All the Boys I've Loved Before' by Jenny Han is also a wonderful choice. The summer scenes in the story play an important role in the development of Lara Jean's romantic adventures. And 'Second Chance Summer' by Morgan Matson is a great one too. It's about family, friendship and a second - chance love during the summer.

One of the best summer romance novels is 'The Summer I Turned Pretty' by Jenny Han. It beautifully captures the essence of first love during the summer months with its vivid beach - side settings and relatable characters.