Books like Guilty sister by Tina Oaks

A Welsh girl returns home for her sister’s wedding, only to discover her fiancé, Rupert Clare, has invited an old flame and a local squire into his London home, leading to a tangled love triangle.

A girl discovers her friends may have been involved in her murder and decides to seek revenge.

A young girl returns to her old slumber party spot, and old wounds start to surface again in a twisted slumber party horror story featuring teenage girls, supernatural elements, and a twist ending that will keep you on the edge of your seat.

A young girl returns as a teenager to prevent another murder and bring the killer to justice, exploring themes of survival and the power of friendship in the shadow of death.

In the town’s high school, Katie’s playful flirtations with Paolo, the new handsome exchange student and soccer star, raise eyebrows—especially when her stepsister Paige notices Katie’s secretive rendezvous.

A teenage girl’s battle with her own reflection confronts themes of self‑image, self‑harm, and supernatural doppelgängers in a fantasy tale aimed at young adults.

"From behind the wheel of her car, Tess Kincaid glimpses a woman walking down a Madison, Wisconsin, street. They've never met, but Tess senses an undeniable familiarity about her. Hair color, square chin, wide-set blue eyes... Tess sees the same features every time she looks in the mirror. Intrigued, Tess introduces herself and discovers that she and her doppelganger, Mimi, have more than appearance in common. They even share the same birthday. Mimi--confident and outgoing where Tess is understated and shy--is convinced they're twins, separated shortly after birth. Tess, who's felt unloved and unmoored since her mother disappeared years ago, only knows that there's more than coincidence at play. And when a body is discovered in a local marsh, Tess is entangled in a search for the truth that will prove fascinating, disconcerting, and ultimately terrifying..."--Cover.