A Dangerous Path - Erin Hunterová

ShadowClan has chosen Tigerclaw as their new leader, and Fireheart fears that this old enemy still harbors dark plans for vengeance on his former Clan. A mysterious threat has invaded the forest, placing every cat's life in peril. And ThunderClan's beloved leader has turned her back on their warrior ancestors. Fireheart can't help but wonder if she's right--has StarClan abandoned them forever?