It started with one lost, shivering pup, it may end in a war... Panthers don't do responsibility. They don't do long-term relationships. They definitely don't raise kids. But when Z discovers a young wolf in the forest, he takes him in, unaware of the powerful beings hunting the pup. Fiona is a witch who can't leave her house, the birds have told her something bad will happen. The mailbox is as far as she'll go, but even that may provide more danger than she's bargained for. When a wolf pup stumbles into her garden, her safe, wrapped-up world heads for a free fall. But along with danger, the pup brings a chance at love-a chance an agoraphobic witch and a bachelor panther shifter aren't likely to find on their own. AUTHOR'S NOTE: The Catalyst is an ensemble book that also features Jane and Cole (from Blood Lust) and Cain (from Blood Lust and Save My Soul)