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)