Does somebody nose how is call this kind of font?

Question

http://lh6.ggpht.com/Luigioni/SDI6f418_XI/AAAAAAAAAHo/BLP0E6TDICg/Luigimpossible.jpg?imgmax=800

if you didn't get it, it says L u i g i

It's the same kind of font the " Iluminati" used in the book "Angels & Demons" by Dan Brown, where you can read it either "normally" and up-side down. and stills the same!

Like this one, too

http://www.lib.utexas.edu/pcl/roundup/angelsanddemons.jpg

i read the entire book twice but i think it doesn't say anything about how is called that uncommon-unique kind of font. And i asked my english teacher (showing her the same picture) but she couldn't tell me either. help!!!

Answer 1

It's called an ambigram.