The Rule Book (the Cheat Sheet, #2)

Nora Mackenzie, an associate agent at Sports Representation Inc. in Los Angeles, earns a promotion to full-time agent but is alarmed to learn her first client is Derek Pender, the famous tight end for the NFL's L.A. Sharks. Derek is her college ex-boyfriend, and the last time she saw him, she was breaking up with him before graduation. She has told no one at the agency about their history, and she already contends with Marty Vallar, a misogynistic colleague who constantly undermines her.

Derek has been withdrawing since a severe ankle injury ended his previous season. His four closest teammates—quarterback Nathan Donelson, running back Jamal Mericks, left tackle Lawrence Hill, and wide receiver Jayon Price—urge him to start dating again. Derek deflects, privately haunted by a college girlfriend none of them know about. He was recently diagnosed with dyslexia after a lifetime of being told by his parents to "apply himself," and football has been his sole source of validation since ninth grade. With a rookie backup generating buzz, Derek fears losing the only thing that ever made him feel worthy.

When Derek discovers that "Mac," his assigned agent, is actually Nora, he refuses to work with her. She chases him to the parking lot and pleads for one chance. Derek agrees but insists they draft 20 strict rules: no discussing their history, no friendship, no kissing, no unnecessary touching. He signs but privately resolves to make her so miserable she quits.

His hazing campaign is relentless: cooking for a nonexistent date, calls at all hours, pointless errands across California. Nora compensates by working nights on legitimate duties. One evening, she cuts her foot on broken glass at his house and Derek tenderly bandages the wound; their lips brush before both pull away. His friends see through the act and call his behavior cruel. Meanwhile, Nora discovers that Derek anonymously funds a foundation helping single mothers pay rent, a cause she once described to him in college, inspired by her own mother's struggles.

Nora's emotional anchor is her mother, Pam, who raised her alone after her father repeatedly drifted in and out of her life and eventually replaced Nora with a stepdaughter. A pivotal college memory explains the breakup: Her father stood her up at dinner the night before an exam, and she had already sacrificed study time for a trip with Derek. These disappointments crystallized her belief that she must prioritize her own dreams, and she ended the relationship, terrified of losing herself in his rising career.

Nicole Hart, the agency's CEO, advises Nora to stop tolerating the hazing, promising professional protection. Nora recruits Derek's friends and books a Las Vegas trip for an endorsement deal with Dapper, a high-end suit company, using the friends' threat to reveal something they found in his bedside table as leverage. Derek erupts: He is terrified of public exposure followed by being cut from the team, echoing his childhood humiliation at being laughed at for struggling to read. Nora tells him to bet on himself. The confrontation prompts Derek to ask why she left. Nora confesses she feared losing her identity, and Derek admits those reasons now make sense. He apologizes but says he cannot be her friend. Privately, he tells his friends he is still in love with Nora and plans to dissolve their contract after Vegas.

After a successful Dapper shoot in Las Vegas, Derek tells Nora at the hotel bar that working together is too painful. The evening dissolves into heavy drinking, and they wake with tattoo wedding bands on their ring fingers: They drunkenly eloped, and a photo on Derek's Instagram has gone viral.

With Nora's job in jeopardy, Derek proposes presenting the elopement as intentional, cashing in an IOU she wrote him in college that he has carried for eight years. On a videoconference, he convinces Nicole and agency owner Joseph Newman that the marriage is real. Nicole arranges a publicized honeymoon at a Cancún resort covered by Celebrity Spark magazine to control the narrative.

In Cancún, sharing one suite and one bed, boundaries dissolve. During a magazine interview, Nora describes her mother's belief in committing only to a partner who uplifts her dreams and realizes Derek has become that person. On a snorkeling boat, Nora starts confessing jealousy over a woman she saw Derek kiss after their breakup, but the boat lurches, her head hits his face, and her vasovagal syndrome, a condition triggered by the sight of blood, causes her to faint. Derek catches her.

Over the following days, they share deeper truths. Derek reveals the woman Nora saw him kiss never came inside his apartment; he did not sleep with anyone for two years. During a beach photo shoot, Nora notices a small "N" tattooed on his inner bicep. He got it the day after she saw him with the other woman, needing proof their relationship was real. They share their first intentional kiss. That evening, Derek opens up about his dyslexia and tells Nora he plans to break every remaining rule to woo her. She panics and calls Pam, who says Derek may have always been the right person at the wrong time. Nora returns and tells him to break them all.

They immerse themselves in each other. On their final night, during a strip question game, Derek reveals his favorite color is hazel, the color of Nora's eyes, and that his foundation for single mothers was inspired by her. They sleep together, and Derek tells Nora she is the only person who has ever made him feel truly wanted. They declare each other friends, breaking the rule against friendship.

The honeymoon ends abruptly when Price's wife, Hope, goes into early labor. On the flight home, both hide their fear that Cancún's intimacy will not survive real life. Nora heads to the office to address rumors the Sharks may cut Derek. Nicole, learning the marriage is fake, reveals she suspected all along. That evening, Derek finds Nora at his house with a box of jerseys from every season of his career, each purchased and worn in secret at his games. Nora tells Derek she loves him and wants a real relationship. Derek reciprocates, calling her a gemstone rather than a stepping-stone, and proposes they date properly.

Two months later, Derek delivers a record-breaking season opener, but an article accusing Nora of marrying him to advance her career drops online, planted by Marty. On camera, Derek defends Nora and then announces his retirement, creating a bigger story to bury the scandal. At his house, he assures Nora the decision is genuine: He has been considering coaching and is ready for a new chapter. He retrieves a ring box from his bedside table, the item his friends found months earlier, and reveals it is the engagement ring he bought in college, in his pocket the day she left him. He proposes they stay married forever, and Nora accepts.

In the epilogue, Nora has quit the agency after Marty made a degrading comment before Joseph, who did nothing. Nicole resigned the same day, and together they founded their own agency dedicated to uplifting women in sports, with Derek's former teammate Nathan among their first clients. Derek coaches at USC, their alma mater, and speaks publicly about his dyslexia. Sharing ice cream topped with cereal in the bathtub, they reflect on their life together: every rule broken, every dream within reach.