How many Hunger Games?

There are four Hunger Games books in Suzanne Collins's series:

1. The Hunger Games

2. Catching Fire

3. Mockingjay (This is technically two books, Mockingjay Part 1 and Mockingjay Part 2, but they are often considered one for the purpose of the series count)

4. The Ballad of Songbirds and Snakes (a prequel)