Book 4 of series 2 of the Warriors series has the clans finding new homes for themselves. While there are questions of StarClan's approval of the new land, each clan claims a part of the new land. Fighting over the territories becomes hard because the clans are used to working together but for some it is easy to go back to the old hostilities. Squirrelflight and Brambleclaw have their problems to work out while Leafpaw struggles with her feelings for Cloudfeather and his for her.
I like how the clans worked together and still, in some ways, continue to do so. Firestar is still the leader amongst leaders regardless of how other leaders want to go back to the old hostilities. But the younger generation is coming into their own. It will be interesting to see who becomes leaders and who turn traitor.