Gregor and the Code of Claw

The stunning conclusion to the riveting Gregor the Overlander series.
Everyone in the Underland has been taking great pains to keep
The Prophecy of Time from Gregor. Gregor knows it must say something
awful but he never imagined just how awful: it calls for the
warrior's death. Now, with an army of rats approaching, and his
mum and sister still in Regalia, Gregor the warrior must gather
up his courage to help defend Regalia and get his family home safely.
The entire existence of the Underland is in Gregor's hands,
and time is running out. There is a code to be cracked, a mysterious
new princess, Gregor's burgeoning dark side, and a war to end
all wars.