I know this isn't really a part of the novel though, but I was just wondering if this is the only novel Collins has written throughout her career?

I know this isn't really a part of the novel though, but I was just wondering if this is the only novel Collins has written throughout her career? Or has she written more of the Hunger Games books? I know she writes children's books too but is this the only Hunger Games novel she's written or is there more?