|The Darkest Hour|
|Publication date||5 October 2004|
| Preceded by|
A Dangerous Path
| Followed by|
The Darkest Hour is the last book of the The Prophecies Begin series.
ThunderClan's darkest hour is upon them, as Tigerstar's quest for power plunges the forest into terrible danger. In order to save his friends, Firestar must uncover the meaning of an ominous proclamation from StarClan:
"Four will become two. Lion and tiger will meet in battle, and blood will rule the forest."
The time has come for prophecies to unfold, and for heroes to rise...
- Kate Cary stated she felt that the "Darkest Hour" had to be her favorite book she has written in the "Warriors" series.