Zach, a human boy who is actually an extraterrestrial agent for the Galactic Union, travels to California's Lassen Volcanic National Park on a dangerous mission to save the Earth from evil aliens known as the Syndicate.

After facing off with the Mogadorian ruler and almost being annihilated, the Garde go into hiding. They must learn to master their Legacies and learn to work together as a team. When they receive a sign from Number Five -- a crop circle in the shape of a Loric symbol -- they know they are close to being reunited. But could it be a trap? Time is running out, and the only thing they know for certain is that they have to get to Five before it's too late....

Agent Sorn picks Zack up from Earth and together they seek other aliens who can speak in support of inviting that planet to join the Galactic Union, while the Gnairt and the Kiapa Kapa Syndicate try to stop them.

"In the epic conclusion to the 5th Wave series, Cassie, Ben, Ringer, and Evan confront the Others' plans for the fate of the human race and the planet"--

Marco has never wanted to be an Animorph but the Yeerks are about to do something that will change his mind.

"Cassie Sullivan, the survivor of an alien invasion, must rescue her young brother from the enemy with help from a boy who may be one of them"--

The Garde, broken and divided, discover that the Mogadorians have commenced their ultimate invasion plans and will stop at nothing to thwart it.

Buzz dreams of going into outer space. One night, his dream comes true. With his dog, Raggs, by his side, he sneaks onto a spaceship. Together, Raggs and Buzz have an awesome outer space adventure.

"Cassie Sullivan and her companions lived through the Others' four waves of destruction. Now, with the human race nearly exterminated and the 5th Wave rolling across the landscape, they face a choice: brace for winter and hope for Evan Walker's return, or set out in search of other survivors before the enemy closes in"--

Young alien agent Zack, surly Galactic Patrol Cadet Vraj, and shy human camper Opal team up to find some Duthwi eggs before they hatch and cause a planetwide disaster, while the Gnairt who were smuggling the eggs try to retrieve them.