Which Novels Depict Royal Struggles Like 'The Constant Princess'?

Catherine has spent her life serving the royal family of Eldoria and hiding her feelings for Prince George, friend and the heir to the throne. But when a reckless night ends with him stumbling into her arms, everything changes. Prince George doesn’t remember what happened, but Catherine does. But when the reality of what happened that night begins to grow inside her, she runs, not for herself, but to save him from the scandal that could destroy the crown. But secrets have a way of resurfacing, especially in a kingdom full of spies, enemies in silk gowns, and a rival princess whose family is plotting to take the throne. When a huge scandal and the truth threatens the monarchy, Prince George must decide: His duty to the crown or the woman who carries his heart, and his heir.

Princess Elara Windsor never wanted the throne, just one night of freedom before her sister forces her back to royal duty. But her last wild night ends in the arms of a tattooed stranger whose touch ruins her…and sets her fate. No names. No promises. No consequences. Until the next morning, when Elara returns home…and discovers the man she slept with is Prince Damon Valen, the man her sister is destined to marry and the future king of two kingdoms. Worse: Elara is carrying his child. Bound by law, trapped by bloodlines, and hunted by those who would kill the unborn heir, Elara is forced into a deadly game of power, lies, and forbidden longing. In a palace fueled by betrayal, where her sister becomes queen and her lover becomes her enemy, Elara must choose: Expose the truth and destroy a kingdom… or protect the man she can never have.

Two kingdoms. One destiny. Zero patience. Princess Ariel of Eldoria has never been the kind to obey rules. Bold, sharp-tongued, and proudly untamed, she swears no prince—especially not Carl, the infuriating heir of Valoria—will ever control her. Prince Carl, on the other hand, has everything he could ever want: charm, power, and a reputation for breaking hearts. But when duty demands he marry the fiery princess of Eldoria, he discovers one thing he’s never had before—a challenge. What begins as a battle of wills soon sparks into something neither of them expected: stolen glances, restless hearts, and a dangerous chemistry that threatens to burn down every wall they’ve built. Can love bloom between two stubborn royals when kingdoms, families, and pride are all on the line? Or will Ariel and Carl’s rivalry tear apart the fragile peace their marriage was meant to secure?

‎Royalty has never been a choice for Princess Amelia Anastasia Ferdinand. On the night of her nineteenth birthday, she learns that the future she dreamed of has already been decided. Bound by an ancient royal agreement, she is forced to marry Prince Andrew Harrison Brown of Dustrich, a cold and distant heir who wants nothing to do with a bride chosen for him. ‎ ‎Thrown into a kingdom that is not her own, Amelia struggles to earn the acceptance of her new family while enduring a husband who keeps his heart firmly out of reach. Yet the deeper she settles into palace life, the more she realizes that her marriage is built on secrets no one is willing to reveal. ‎ ‎When another prince enters her life, offering the kindness and understanding she has longed for, Amelia finds herself torn between the life she wishes she had and the vows she never chose. ‎ ‎But some marriages are not born of politics alone. Some are forged by fate... and a centuries-old secret that could change not only two lives, but the future of two kingdoms. ‎ ‎As hidden truths begin to surface, Amelia must decide whether to follow her heart or embrace the destiny that has been waiting for her since birth.

Princess Christie has secretly desired her older brother, Gregory Halrion, the crown prince of Aerithia, since childhood and has always feared she was cursed for harbouring such forbidden feelings. But when a secret DNA test reveals she isn't a Halrion by blood, her shame turns to hope. She believes she was meant to be with him. The royal family knows the truth. Yet, her love for Gregory remains forbidden. As rumours grow into scandal and a palace conspiracy threatens to destroy her bond with Gregory, and the Halrion dynasty itself, Christie is forced to choose between duty and desire. And when her true identity is finally revealed publicly… Will her love for Gregory still be forbidden?

She was forced to get engaged to a prince. Then she accidentally married his brother instead. *** Three months ago, Lady Zoey Arden was just an ordinary girl from a small town. Then her estranged father resurfaced, dragging her into an arranged marriage with Crown Prince Aaron Condor. The union is more than a royal spectacle; it’s a fragile peace treaty. The Ardens and Condors must unite or risk civil war breaking out in Terres Somnia. To everyone’s surprise, Zoey and Aaron’s engagement blossoms into something real. Or so she thought... until she discovers Aaron shared a kiss with his childhood best friend, Lady Emily, on the night of their engagement ball. The fairytale she’s been thrust into shatters overnight. Fleeing heartbreak and scandal, Zoey crosses paths with Duke James, Aaron’s half brother and Emily’s fiancé. Bound to her by their shared plight, James ropes Zoey into a revenge ploy. He proposes to her, intending to take Aaron's place and steal the crown out from under him. When the jilted lovers meet up later that night, they renege on the plan, citing temporary insanity for having entertained it at all. However, one too many drinks leads to a reckless “I do." Zoey finds herself bound by law and love to the wrong prince. Little does Terres Somnia know she's now the wife of the country's long lost prince and rightful heir. As secrets unravel and loyalties blur, Zoey must decide where her heart truly lies: with the prince who broke it, or the one who helped her run from the heartbreak. Two princes. One crown. One choice. He who wins her heart wins the throne.