Gregor and the Marks of Secret [SEP] series
Gregor and the Marks of Secret
Gregor and the Marks of Secret is a high fantasy/epic fantasy novel, the fourth book in the critically acclaimed "The Underland Chronicles" by Suzanne Collins. It picks up soon after the end of "Gregor and the Curse of the Warmbloods". 
Plot summary.
The novel opens with Gregor's little sister Lizzie preparing to go to camp, while Gregor and Boots head down to the Underland. Ripred introduces Gregor to the now-teenaged Pearlpelt so Gregor can observe "
Underland Chronicles"
2. "Gregor the Overlander" (2003)
3. "Gregor and the Prophecy of Bane" (2004)
4. "Gregor and the Curse of the Warmbloods" (2005)
5. "Gregor and the Marks of Secret" (2006)
6. "Gregor and the Code of Claw" (2007)
- "The Hunger Games" trilogy
2. "The Hunger Games" (2008)
3. "Catching Fire" (2009)