Clue: First to read new Little Miss Punk children's book (15)
Answer: RUMPELSTILTSKIN
Explanation: Definition: children's book
A charade of R ('first to **R**ead') plus UMPELSTILTSKIN, an anagram ('new') of 'little miss punk'. The answer is a character and the tale in which he appears; there may well be a book with this title.