Harry Potter and the Philosopher's Stone by J.K. Rowling
Genre: young adult fantasy
I tried to think of a Christmas-themed book that I've read which also happens to be sci-fi, fantasy, or YA, and I couldn't think of ANYTHING!
So, I decided to go with the series I usually end up re-reading around Christmastime, instead.
If you know of any Christmasey fantasy, sci-fi, or YA, please post the title and author in the comments, so I can check them out.
What can I say that hasn't already been said? The hidden world of wizards and witches that J.K. Rowling creates in this first book is incredibly appealing to readers of all ages. I first read this book at sixteen, and I was enthralled; I pulled my entire family into Harry Potter-fandom with me. While the Philosopher's Stone is slightly more juvenile than the later books, I don't find that it detracts from my enjoyment. After all, Harry is only eleven years old in this story. There's a reason this series has such a huge fan base; if you haven't already read this, give it a try. You'll be proud to call yourself a muggle.
View my suggested books by J.K. Rowling