This is book number 5 in the Warriors (Erin Hunter) series.
ShadowClan has a dark new leader, but will he be satisfied with his power now -- or does his desire for revenge burn even more strongly? Fireheart fears that there is a connection between the rise of Tigerstar and the terrible dreams that haunt his nights, murmuring of danger and death.
Meanwhile, a mysterious and vicious threat unlike any other has invaded the forest, placing every cat's life in peril. Fireheart's beloved leader has turned her back on their warrior ancestors, and Fireheart can't help but wonder if she's right. Has StarClan abandoned them forever?
“A fast-paced animal adventure. Recommend this series to fans of animal fantasies such as Redwall or Dark Portal.”
-VOYA
“A good, suspenseful adventure story that urges readers onward.”
-ALA Booklist
“With compelling intrigue and fast-paced actions, this is one of the most exciting books in the series.”
-Booklist