Book 1 & 2 from Rick Yancey: The 5th Wave and The Infinite Sea

Condition of Book 1

The 5th Wave, ISBN: 9780141345833, minor wear on the spine and pages have yellowed (see scans) otherwise good copy

The 1st Wave took out half a million people. The 2nd Wave put that number to shame. The 3rd Wave lasted a little longer. Twelve weeks . . . Four billion dead. In the 4th Wave you can't trust that people are still people. And the 5th Wave? No one knows. But it's coming. On a lonely stretch of highway, Cassie runs. Runs from the beings that only look human, who have scattered Earth's last survivors. To stay alone is to stay alive, until she meets Evan Walker. Beguiling and mysterious, Evan may be her only hope. Now Cassie must choose- between trust and despair, between defiance and surrender, between life and death.

Condition of Book 2

The Infinite Sea, ISBN: 9780141345840, pages have yellowed otherwise good copy 

The Infinite Sea is the second book in the phenomenal and bestselling 5th Wave series by award-winning author, Rick Yancey. Perfect for fans of The Hunger Games, Divergent and The Maze Runner* *The 5th WAVE is now a major film by Sony Pictures, starring Chloe Grace Moretz* 'Wildly entertaining . . . I couldn't turn the pages fast enough' The New York Times How do you rid the earth of seven billion humans? Rid the humans of their humanity. 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. Because the next attack is more than possible - it's inevitable. No one can anticipate the depths to which the Others will sink - nor the heights to which humanity will rise