Discworld (Young adult)

1.

A talking cat, intelligent rats, and a strange boy cooperate in a Pied Piper scam until they try to con the wrong town and are confronted by a deadly evil rat king. One rat, popping up here and there, squeaking loudly, and taking a bath in the cream, could be a plague all by himself. After a few days of this, it was amazing how glad people were to see the kid with his magical rat pipe. And they were amazing when the rats followed hint out of town....

3.

Tiffany Aching, a young witch-in-training, learns about magic and responsibility as she battles a disembodied monster with the assistance of the six-inch-high Wee Free Men and Mistress Weatherwax, the greatest witch in the world.

5.

Fifteen-year-old Tiffany Aching, the witch of the Chalk, seeks her place amid a troublesome populace and tries to control the ill-behaved, six-inch-high Wee Free Men who follow her as she faces an ancient evil that agitates against witches.