Lies

Lies is the 3rd book in the Gone series by Michael Grant. Astrid and Sam are on the cover. There are many ideas about who is on the back of Lies such as:

Quinn and Orsay

Drake and Brittany

Zil and Brittany

Etc..

Summary
It's been seven months since all teh adults disappeared. GONE.

It happens in one night. A girl who died now walks among the living; Zil and the Human Crew set fire to Perdido Beach; and amid the flames and smoke, sam sees the figure of the boy he fears the most: Drake. But Drake is dead. Sam and Caine defeated him along with the Darkness-or so they thought.

As Perdido Beach burns, battles rage: Astrid against the Town Council; the Human Crew versus the mutants; and Sam against Drake, who is back from the dead and ready to finish where he and Sam left off. And all the while deadly rumors are raging like the fire itself, spread by the prophetess Orsay and her companion, Nerezza. They say that death is a way to escape the FAYZ. Conditions are worse than ever and kids are desperate to get out. But are they desperate enough to believe that death will set them free?