This is a series I will write later, as I have lots of unfinished fanfics.
Takeover - Jayheart and Leopardheart have always lived in ThunderClan in peace. But when Night takes over the Clans, the two siblings must live in slavery and slowly work out a way to stop it.
Star's Cave - It's the last straw for Leopardheart. Angered, he escapes ThunderClan. He soon finds out that he must make a great journey, or else Night will rule forever.
Heart of a Leopard - In the Star Cave, Leopardheart found out how to defeat Night. Now he must fight his hardest, harder than he ever has before.