Colleen Hoover is the queen of BookTok for a reason: she's a master at mixing heartbreaking romances with so-hot-they'll-make-you-swoon sex scenes. "It Ends With Us" might just be her most popular book to date. The story follows Lily, a woman who built her business from scratch after college, and her distant neurosurgeon boyfriend, Ryle. Just as Lily and Ryle are starting to share their complicated histories with each other, her ex and first love, Atlas, reenters her life and leaves her questioning everything.