Books like The Ruby Circle by Richelle Mead

A high school romance turned perilous when new vampires stalk the academy, forcing Rose Hathaway to protect her best friend while risking her love for Dimitri.

During a high‑stakes winter break at St. Vladimir's Academy, Rose faces a Strigoi threat, tangled loyalties, and a mandatory ski trip, all while navigating a love triangle with Dimitri, Mason, and Christian.

In Palm Springs, alchemist Sydney must protect Moroi princess Jill Dragomir by hiding at a private school, where human and part‑vampire students clash over friendship, romance, and deadly intrigue.

Sydney Sage, a studious alchemist, and Jill Dragomir, a Moroi princess, hide at a California boarding school, juggling hidden powers, budding romance, and the looming threat of Strigoi as they protect their secret.

Sydney Sage is an alchemist, one of a group of humans who dabble in magic and serve to bridge the worlds of humans and vampires. They protect vampire secrets - and human lives. In the Indigo Spell, Sydney was torn between the alchemist way of life and what her heart and gut were telling her to do. And in one breathtaking moment that Richelle Mead fans will never forget, she made a decision that shocked even her.... But the struggle isn't over for Sydney. As she navigates the aftermath of her life-changing decision, she still finds herself pulled in too many directions at once. Her sister Zoe has arrived, and while Sydney longs to grow closer to her, there's still so much she must keep secret. Working with Marcus has changed the way she views the Alchemists, and Sydney must tread a careful path as she harnesses her profound magical ability to undermine the way of life she was raised to defend. Consumed by passion and vengeance, Sydney struggles to keep her secret life under wraps as the threat of exposure - and re-education - looms larger than ever. Pulses will race throughout this thrilling fourth installment in the New York Times best-selling Bloodlines series, where no secret is safe.

Bryn Aven, a half-breed in the Kanin realm, seeks to serve the kingdom she loves and discovers her own heritage while navigating intrigue in the glittering Skojare palace.

A young niece of Adolf Hitler in 1930s Munich grapples with duty and forbidden love when she meets a brave Jewish reporter amid rising Nazi terror.