Ambigrams

An ambigram, also sometimes known as an inversion, is a graphical figure that spells out a word not only in its form as presented, but also in another direction or orientation. Douglas R. Hofstadter describes an ambigram as a "calligraphic design that manages to squeeze two different readings into the selfsame set of curves."

These are some ambigrams in my collection. My inspiration is Dan Brown's novel's ambigrammist John Langdon.