Forbidden love in books is a perfect blend of dangerous and tantalizing that we can never get enough of it. A delight storm of chaos and conflict can definitely arise from a character dating their sibling’s best friend (or their best friend’s sibling). These familiar and comfortable dynamics, create easy affection but also a bit of mystery that draws readers in close. Whether it’s Laurie and Amy from Little Women or Harry and Ginny… the world of “best friend’s sibling” is fraught with tension and excitement.

Twisted Love by Ana Huang

Always cold and distant, Alex guards his heart with walls of icy steel. But this strong exterior begins to crack when he is asked by his best friend to look after his sister, Ava. Ava is the exact opposite of Alex. She has a free spirit and a huge heart despite the childhood she can’t remember. When Alex becomes her neighbor, she knows she shouldn’t see him, she shouldn’t want him, even if she is the only person to truly see him for who he is.

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Delilah Green Doesn’t Care by Ashley Herring Blake

Delilah’s photography business is taking off, she loves living in the city, and she never goes to bed alone, a new girl every night is the way she likes it. But when she is called back to her hometown to take photos of her stepsister’s wedding, her life takes a turn when she realizes the bride’s snobby friend Claire will also be a part of the event. Claire’s life is already full of chaos, running a bookstore and raising her son with little support from her ex, she does not have time for romance. But when the two start to plot a way to stop the wedding and save the bride from her terrible fiancé, Claire can feel Delilah pulling at her heart, and she is not sure she wants the feeling to stop.

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The Game Changer by Lana Ferguson

As the darling TV baker in town, Delilah has grown comfortable in the spotlight, but her producers need to find a way to bring numbers up fast. Enter Chase, a famous hockey player and best friends with her brother, whose very public break-up is starting to seriously affect the popularity of his team. He agrees to work with Delilah to bring his public image back up and grow her audience with local sports fans. The plan is a win-win, but once their true feelings get involved, the couple is sent on a crash course headed straight toward some thin ice.

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PS: I Hate You by Lauren Connolly

After losing her brother, Josh, to cancer, Maddie is determined to see out his last wishes: sprinkle his ashes in all the places he never had the chance to visit. The problem is that her brother’s best friend and breaker of Maddie’s heart, Dom, must accompany her on the journey. The two set off together, revisiting their past relationship and wandering through new cities in Josh’s honor. But when a storm leaves them trapped in a room with only one bed, Maddie wonders if this trip meant more to her brother. Maybe he is trying to play matchmaker to lead his sister to a happy ending of her own.

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The Wedding Engagement by Zoe Allison

Liv has loved Arran since they were kids, but after a terrible blind date, she is certain he has zero feelings for her. Now, her brother is getting married to her best friend, and Arran is the best man. The two will be seeing a lot of each other in the wedding planning, which does not help the feelings of dashed hope Olive once had at the possibility of a relationship with Arran. But Arran is also withholding his true feelings for her, feelings that threaten to boil over as the wedding approaches.

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Sleeping with the FrenemySleeping with the Frenemy by Natalie Caña

After a fight, Sofia is ready to make amends with her best friend, but she has no intention of making up with her friend’s brother, Leo. Leo, the other half of their secret on-again-off-again relationship, has spent the past year recovering after a serious injury and is ready to reconnect with Sofi. After an unexpected housing situation, Sofi and Leo must become roommates, making it even harder for Sofi to get over her past feelings for the man who broke her heart. But with some encouragement from love-scheming relatives, the two might just be able to patch up their relationship and make it stronger than ever.

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Done and Dusted by Lyla Sage

Luke knows he should stay away from his best friend’s sister, Clementine when he sees her walk into his bar. Clementine was at the peak of her life, she had finally moved away from her small hometown, gotten a college degree, and made a life for herself riding horses. But, after a terrible accident makes it nearly impossible for her to ride, she must go back to her small town, back to her family, and back to the town bar Luke owns. They both know being together would be a mistake. So why can’t she get Luke out of her head, and why does Luke look at her like he’s seeing her for the first time?

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Into the Tide by Laura Pavlov

When Lila left for college, Hugh saw her as his best friend’s sister. Now, she has come back for the summer and tips his world on its edge. When asked if Lila can have a job at Hugh’s restaurant for the summer he immediately agrees. The more they work together, the more he falls for Lila, who has a very big ask of him. One that will complicate their relationship and make them much more than friends, even if she promises to keep it a secret. She also promised not to get attached, but Hugh is not sure he can say the same.

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Love at First Set by Jennifer Dugan

Lizzie loves her job at the gym, other than her annoying boss, who sees her as just a receptionist rather than the strong and dedicated person who keeps the gym in working order. One day, Jamie, Lizzie’s best friend and son of her boss, asks her to be his plus one at his sister Cara’s wedding. She agrees, and after one too many, she finds herself giving a drunken pep-talk to Cara and convinces her to call off the wedding. Now, Cara is directionless and ready to discover who she truly is. She and Lizzie agree to keep everything between them casual. But the more time she spends with Cara, the more Lizzie starts to fall for her, but this comes with keeping secrets from Jamie and her boss, secrets that threaten her job and her entire future.

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Fair Catch by Kandi Steiner

Riley is used to people discounting her. As the only girl playing in collegiate football, no one thinks she can keep up, but she can handle that. What she may not be able to handle is her coach making her roommates with her brother’s best friend and her teammate, Zeke. Zeke wants to protect Riley; he owes it to her, given his rocky past with her brother, but Riley sees his protectiveness as a barrier to establishing herself. Spending time as teammates was more than enough for Riley, but as roommates, she is constantly aware of him, how undeniably and infuriatingly attractive he is, and how thin the walls are.

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Wild Love by Elsie Silver

When Forbes finally has things together to start his recording studio in Rose Hill, a girl shows up at his door, claiming to be his daughter. Now, he must balance the parenthood of a sulky twelve-year-old who just wants to understand her family, while starting a business. He is barely managing that when his best friend’s sister, Rosie, comes back to town, and she is no longer the girl he remembers. After pleading with him for a job at the recording studio, Forbes does all he can to stay away and unattached to Rosie, but he is not sure how much longer he can keep his feelings hidden, not to mention the complications his new daughter adds to the situation.

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Fix Her Up by Tessa Bailey

Everything in life is fun to party planner and clown Georgie, but everyone else in her town refuses to take her seriously since she turned away from her family’s business. She wants to prove she is a successful, smart, and independent grown woman, so she devises a plan to turn herself into the woman and business owner people will respect. The most crucial step to this plan is convincing Travis Ford, her brother’s best friend and former baseball star, to date her and prove she can handle a mature relationship. And after Travis’s injury led him back home to flip houses, being with her could put him on the path to a new job working at her family’s home renovation business, so he agrees. But Travis soon learns Georgie is nothing like the girl he knew growing up, and he’s not sure how much longer he can fake his feelings for her.

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Dashing for Love by Valerie Pepper

Goldie is getting settled in her new career as a journalist and new life on her own, away from all the drama of her small town, when, one night, she sees she has a match on Blinding Love, the dating app without photos. It pairs people based on a personality test, and she may have just found her dream guy. However, she does not know the man on the other side of the phone is Matty Brodigan, who she has had a crush on since she was young. Matty is a bit down on his luck in love when he gets the app, and when they decide to meet at a masquerade party, he discovers the woman he is falling for is none other than Goldie, his best friend’s younger sister. Could their new feelings lead them down a path to ruin, or will they take the risk and be together?

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To Love Jason Thorn by Ella Maise

Olive has spent her life trying not to fall for Jason Thorn. Growing up together, he was her first love and the first heartbreak. Now, she sees him everywhere as Hollywood’s newest heartthrob. She tries to escape him in her writing, but when her book blows up and gets adapted into a film, who else would be cast as the lead than Jason Thorn? Now, a writer for the movie, Olive must focus on her work, knowing all her feelings for him, old and new, are about to be exposed.

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Never Marry Your Brother’s Best Friend by Laura Landish

To secure a business deal, the devastatingly handsome workaholic Cater asks his best friend’s younger sister, Luna, to marry him, which she turns down with tears of laughter rolling down her cheeks. But Carter is ready to commit to this plan and convince everyone he is in love with Luna. But his plan may be working a bit too well when Luna starts to fall for him.

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This Summer Will Be DifferentThis Summer Will Be Different by Carley Fortune

Lucy spends every summer on Prince Edward Island with her best friend, Bridget. And every year, she tries (and fails) to avoid her chemistry with Felix, Bridget’s younger brother. But when Bridget runs off to the island a week before her wedding, Lucy returns to their beach house to help her. This summer, she’s determined not to let Felix distract her. But Lucy soon finds that her feelings for Felix run a little deeper than she thought. And this summer? It could change everything.

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