Unfortunately, it can be hard to jump in if you're only interested in a specific clan. This whole collection is called the Clan Novel Saga, and it's pretty good overall, though quality varies by book. Meaning that a Setite may be the star of book four, but they may show up in later books too. The Clan Novels are a 13-part novel series that tell an interwoven story, with each one focusing on important players from a particular clan, but those characters aren't usually just in the novel for their clan.