If you love fantasy novels and want something that is suspenseful but still whimsical then this is a fantastic book. The Night Circus has been compared to Harry Potter, which while I think it does have a similar feel to it, this book is unique enough that it will hold you to the end, and familiar enough that is understandable and enjoyable. So if you want a good read, then I highly recommend this book.
The Night Circus Website
Erin Morgenstern's Website