Heart Hunting Magic - Stag Heart Pendulum, #2

My heart is rooted here to stay. When Tristan Rentier disappears and a law firm from the realms takes worryingly radical steps to find him, Victoire discovers new levels of realms intrigue. Soon, magical heavyweights gather to search for him, and it's unclear whether they intend to save him or make sure he ends up dead. It's up to Victoire and her dubious new ally, Dora Vinok, to team up and protect him as well as his estate.
Because Vic knows there's an ancient magical artifact hidden somewhere on the Rentier grounds, and she must not ever let it fall into the wrong hands.