Gregor the Overlander (Underland Chronicles, #1)

by Suzanne Collins

Mutual need is a strong bond. Stronger than friendship, stronger than love.” “Do rats love?” said Gregor dryly. “Oh, yes,” said Ripred with a smirk. “We love ourselves very much.”

You see, I tired of constant fear, so I made a decision. Every day when I wake I tell myself that it will be my last. If you are not trying to hold on to time, you are not so afraid of losing it.”