The Rise of Nine by Pittacus Lore

This book has more fighting and less plot than the first two in the series. All of the Lorics meet one another eventually except for 5, who has not yet been introduced. We follow Nine a lot who travels with Four. Six, Marina, and Ella meet Eight. They all fight Mogs, and try to destroy Setrakus Ra. There is a lot of action but a lot of loose ends that the next books in the series will need to address.