Gregor and the Curse of the Warmbloods

Gregor is back again in the third book, Gregor and the Curse of the Warmbloods. 

There is an evil plague starting in the Underland. It effects almost everybody who is a warmblood. 

WARMBLOOD NOW A BLOODBORNE DEATH
WILL ROB YOUR BODY OF ITS BREATH
MARK YOUR SKIN, AND SEAL YOUR FATE
THE UNDERLAND BECOMES A PLATE.

TURN AND TURN AND TURN AGAIN.
YOU SEE THE WHAT BUT NOT THE WHEN.
REMEDY AND WRONG ENTWINE,
AND SO THEY FORM A SINGLE VINE.

BRING THE WARRIOR FROM ABOVE
IF YET HIS HEART IS SWAYED BY LOVE.
BRING THE PRINCESS OR DESPAIR,
NO CRAWLERS CARE WITHOUT HER THERE.

TURN AND TURN AND TURN AGAIN.
YOU SEE THE WHAT BUT NOT THE WHEN.
REMEDY AND WRONG ENTWINE,
AND SO THEY FORM A SINGLE VINE

THOSE WHOSE BLOOD RUNS RED AND HOT 
MUST JOIN TO SEEK THE HEALING SPOT.
IN THE CRADLE FIND THE CURE
FOR THAT WHICH MAKES BLOOD IMPURE.

TURN AND TURN AND TURN AGAIN.
YOU SEE THE WHAT BUT NOT THE WHEN.
REMEDY AND WRONG ENTWINE,
AND SO THEY FORM A SINGLE VINE.

GNAWER, HUMAN, SET ASIDE
THE HATREDS THAT RESIDE INSIDE.
IF THE FLAMES OF WAR ARE FANNED,
ALL WARMBLOODS LOSE THE UNDERLAND.

TURN AND TURN AND TURN AGAIN.
YOU SEE THE WHAT BUT NOT THE WHEN.
REMEDY AND WRONG ENTWINE,
AND SO THEY FORM A SINGLE VINE.

The mom (Gregor's mom) wanted to go to the Underland this time and she comes. When a bat affected by the plague comes crashing to Regalia, a tick jumps off and bites the mom. She's infected. The rush her to the infirmary.

They go on a quest to find the cure. They go to the place where the plague first started centuries ago. Ripred, Mange, Temp, Lapblood go on this journey with Gregor to the jungle.

While they are in the jungle, they meet to people. Hamnet and Hazard. Hamnet is Luxa's uncle. Hazard is a halflander. A boy who came from a male Underlander and a female Overlander. He has bright green eyes instead of lavender and dark brown curls. The mother is dead.

Luxa, who has been missing for a few months, appears in this jungle. Hamnet mistakes her for his sister. His twin sister. The one who had Luxa and died with her husband while fighting rats.

Hamnet later dies of trying to rescue the cure from the cutters (ants). Hazard starts to cry. Luxa takes him in as her own brother. She takes him back to Regalia.

Read more in "Gregor and the Curse of the Warmbloods" by Suzanne Collins.