Tarja Titan - The Terrian Chronicles, #1

Abused and neglected for nearly a decade, Tarja Titan always longed for a home. .But she didn't anticipate the reception she'd receive upon her return to a world she thought only existed in fiction For starters, everyone in Elemental Society knows her name. Even if she has no recollection as to why. For another, she's going to a university to hone a rare supernatural ability, or abilities, she's never heard of. Everywhere Tarja goes and everyone she speaks to, new secrets emerge.
Like the fact she was murdered as a child and somehow here she is, as alive and well as her new classmates. And this school has more secrets than Tarja could imagine. It has hidden rooms, corridors, and yeah, resident spirits love hanging out here. And they're not shy about sharing a few stories. Even if her newly-discovered godbrother is. Calling all fans of E. E. Holmes' World of the Gateway and Carissa Andrews' The Windhaven Witches. If you like strong heroines, elemental magic, complex plots involving an alternate timeline where conspiracies to bring about global crises exist, and young adult fiction, or better yet YA+, given the more mature subject matter, you will fall in love with Tarja Titan.