While I know Rowling had to be a Pratchett fan because of a few references that I caught in her series, she did once say that she did not realize that she was writing fantasy with the Harry Potter series. In response, Pratchett said, "I would have thought that the wizards, witches, trolls, unicorns, hidden worlds... would have given her a clue?"
Looking back at this book, it could seem like a bridge story because of the new characters introduced that will be used again, including the Hiver entities. But taken by itself, A Hat Full of Sky shows Tiffany's continued growth as a witch and begins her socialization in a world of her contemporaries. It also shows again that she has amazing potential as a witch.
Recurring characters and themes in this book:
"A Witch should never stand between two mirrors."
“The world is your... Shrimp”
Awfully-Wee-Billy-Bigchin Nac Mac Feegle
Bells of St. Ungulant
Dragons on the Moon
Events of Carpe Jugulum
Events of Maskerade
Events of Wee Free Men
Miss Perspicacia Tick
Nac Mac Feegle
Ratbag, the cat
Roland, son of the Baron
The Goode Childe’s Book of Faerie Tales
The Lancre Witch Trials
The Queen of the Fairies
The Yellow Toad
Wentworth AchingZakzak Stronginthearm