recently, i read the book "Angels and Demons" by Dan Brown. i was fascinated by the ambigrams illustrated in the book. ambigram is a form of art, where words are written in such a way that they look the same even when upside-down. the illustrations in the book are the works of John Langdon, a famous ambigram artist. these are the ambigrams found in the book:

i couldn't find the Diamond of Illuminati though. in the book, it is said that the Diamond of Illuminati is so perfect and flawless that the viewver can only watch in awe. how true...this is definitely a must-read book.