Terry Pratchett’s. Wee Free Men. (Full Audiobook)

Tiffany Aching is a 9-year-old girl who literally sees things differently from others. While playing by the river near her home, she sees two tiny blue, kilted men who warn her of a "green heid" in the water. Suddenly a vile green monster, Jenny Greenteeth, appears in the water. Using her brother Wentworth as bait, Tiffany ambushes the beast and cracks it with a frying pan, while Wentworth is completely unfazed, as he is unable to see either the little men or the monster. She goes into town to visit a travelling teacher and comes upon Miss Tick, a witch who has been watching her. Tiffany is told that these little men are the Nac Mac Feegles, who are rough and rowdy fae folk who speak in Scots. Miss Tick informs her that she is likely the witch of the wold she resides in, and gives her the toad familiar she carries as a guide before tricking Tiffany out of the tent and disappearing.