Survivants, cycle 2, tome 4
Erin Hunter2017

The Wild Pack is in high spirits after rescuing Alpha and Beta’s pups. Only Storm believes that danger still walks among them—and it won’t be long before the traitor dog strikes again. She must convince her Packmates to stand together against the most malicious and elusive enemy they have ever known...before terror and doubt tear them apart.

Titre original : Red Moon Rising (2017)