From the Bookshelf of Building a SciFi/Fantasy Library…

[close] Book #1 Quantum Enchantment: Rosette is a child of two worlds: Gaela, steeped in magic, and Earth choked with failing technology. The key to their survival is literally in her blood, a spell passed down the family line to preserve the one they're sworn to protect. Unaware of her lineage, Rosette runs scared when her family is murdered. She takes refuge with Nell, a shape-shifting high priestess of the ancient blood, who teaches her the arts of witchcraft, stars and sword.

Shadowed by the fabled Kreshkali, Rosette and the temple cat, Drayco, find themselves little more than a step ahead of those who will do anything to control the portal that links the many-worlds.