After the Fall is the second book in The Fall Series.

Six months after society’s collapse, Derek leads a fractured group of survivors through the ruins of Kinross and New Haven. Amid mindless undead and power-hungry opportunists, Derek’s burden as a reluctant leader grows heavier — especially when the woman he loves is struck down in a brutal ambush. With his closest allies divided, and whispers of a second lab tied to the outbreak surfacing, Derek must confront not only the walking dead, but the weight of every life he's failed to protect. And if humanity’s last hope is buried in secrets, Derek will have to decide: does survival mean sacrificing what’s left of your soul?