The original synopsis of Harry Potter and the Philosopher’s Stone summarizes the first book and describes the magic and wonder of the tale very well. A copy of the synopsis was included on Rowling’s original website but that copy ended at the bottom of page one. The full synopsis is reproduced in the book Harry Potter A History of Magic, the companion book to the exhibition at the British Library.
Interesting facts and notes
Hagrid is described as the one who delivered the letters to Harry in Privet Drive, which means he was using quite a bit of magic for someone who, strictly speaking, is not allowed to do so.
JKR.com: Synopsis of PS