Dan Brown's book, "Angels and Demons" popularized ambigrams. The work of John Langdon was crucial to the plot of the book, and his skill at creating beautiful designs in unsurpassed.

You can see more of Mr. Langdon's beautiful lettering at his web site.

Designing ambrigrams can be frustating, but if you work things through, they're a lot of fun. After reading the book by Dan Brown, "Angels and Demons" I thought I would try my hand at doing a couple of AMBIGRAMS. These were my first attempts, and I surprised myself with the results.