The Monster Series 3 Books Sets Collection by Michael Grant

Titles in this set:

Hero
Villain (The Monster Series)
Monster

Hero
Vector may just be the deadliest enemy Dekka and the group will ever face. He is a swarm of disease-bearing insects. His victims are hit with a wide range of supercharged diseases, and are then unable to die, but go on and on in a living hell.

Villain 
Dillon Poe wanted to be a comedian once . . . but everyone made fun of him. Dillon the loser. Dillon the freak. Now he can control anyone with the power of his voice and he’s preparing to send thousands to their deaths. Who’s laughing now?

Monster: The GONE series may be over, but it's not the end of the story
MICHAEL GRANT'S ACTION-PACKED AND MUCH ANTICIPATED NEW BOOK, SET IN THE AFTERMATH OF THE BESTSELLING GONE SERIES. When the dome came down, they thought it was the end of the troubles. Truth is, it was just the beginning.