Fifth Wave, by Rick Yancey

Fifth WaveSummary:  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.

Putnam

Find it at WCPL

How to Lead a Life of Crime, by Kirsten Miller

How to Lead a Life of CrimeSummary:  A teenaged pickpocket, haunted by the ghost of his brother killed by his father, is recruited for Mandel Academy, a school for criminals where only one student survives each semester.

Razorbill

Find it at WCPL