The Unhoneymooners, written by Christina Lauren, is a hilarious contemporary romance novel. It follows the story of Olive Torres, who reluctantly goes on her twin sister's honeymoon with Ethan Thomas, the best man who she can't stand. As they navigate unexpected situations and spend time together, their initial animosity turns into a sizzling romance. This book is filled with witty banter, laugh-out-loud moments, and explores the power of second chances.