City of the Rats is the third novel in the eight-volume fantasy series Deltora Quest, written by Australian author Emily Rodda.

[2][3] The novel continues Lief, Barda, and Jasmine's journey to find the seven missing gems of Deltora, braving dangers and guardians in each book.

They find and enter Tom's shop and buy useful provisions such as Fire Beads, Water Eaters, Glowing Bubbles, and Instant Bread.

When Filli comes out of hiding from Jasmine's shirt, a Ra-Kacharz mistakes it for a rat and gives the trio two choices, to live or to die.

A girl named Tira managed to free them and shows them the secret way out, by passing through the kitchen trash tube.

Lief remembers that the opal's vision of the future is not always true, and they continue their quest to seek their fourth gem at the Shifting Sands.