Angels & Demons, another book that written by Dan Brown. This is the earlier episode than Da Vinci Code, the main character, Robert Longdon also first appear in this book.
This book front desgin is so amazing! You can able to see the tittle "Angels and Demons" vertically when you upside down the book. There are also many symbol like this appear in the books, so download the image that i post and turn upside down the image and found out the secret of these symbol!!