Power of Three was the 3rd series in the Warriors Saga. It followed the adventures of Firestar's grandchildren as the Clans settle down in the lake territory: Hollyleaf, Lionblaze and Jayfeather, as Hollyleaf and Lionblaze went from kit to young warrior while Jayfeather went from kit to medicine cat, and tried to uncover the meaning of a prophecy that Firestar received from Skywatcher (There will be 3, kin of your kin, who hold the power of the stars in their paws). The books are The Sight, Dark River, Outcast, Eclipse, Long Shadows and Sunrise (once called Cruel Season). This series takes placeainwhisker (Sorreltail's brother) died in a storm, hit by a falling branch. Also half a year after the events of Sunset. During this period, it was revealed that Ro, Sorreltail's son, Molepaw, died of Greencough that couldn't be cured. The age group that this series is targeted towards tends to be 11-13 year olds, because the end of the arc tends to be getting more violent as Hollyleaf is buried in the tunnels.
- There is an error in the picture: Hollyleaf has green eyes and Jayfeather has blue. There is a cover that has the correct eye colors as well.
- In the first book Brightheart was to get either Icekit or Foxkit. But in their ceremony in the third book they get Squirrelflight and Cloudtail.