The Case of the Sphinx Secret. Zara Whispers's Pet Psychic Mysteries, #2

Zara Whispers is no longer just a pet sitter; she's the magical community's official liaison to the animal world. But her new status comes with a terrifying cost: higher stakes and no room for error. Hired to care for the Sphynx Cat of a recently murdered young witch, Zara finds herself deep inside protected Fae territory, a world ruled by suspicion and ancient law. The Cat, secretive and fiercely protective of a Fae path, refuses to open up to Zara's mediumship-and there's no trusty toy to serve as an anchor.
Forced to rely on the banished Fae ally, Lyra, Zara must anchor her unstable power to a single drop of Fae water. When she discovers the Cat is violently averse to a specific, nefarious incense, she realizes the Cat's secret is the key to exposing Malachi-the rogue bird-napper from her last case-who is now collaborating with a dark coven to transcribe stolen spells and stage a hostile takeover of the local magical world.
Isolated and racing against time, Zara must use her evolved mediumship and her most mundane pet-sitter tools to follow the Cat's secret, jumping path and disrupt a powerful spell before the entire Fae community is plunged into chaos. The secret to solving a magical murder isn't always magic-sometimes, it's just knowing where a cat will land.