Q:Tuva or Bust! -  Tuva or Bust! (1991) is a book by Ralph Leighton about the author and his friend Richard Feynman's attempt to travel to Tuva.The introduction explains how Feynman challenged Leighton at the time a high school math teacher Whatever happened to Tannu Tuva (the Tuvan People's Republic)? Since Feynman had a reputation as a prankster and had proven himself entirely capable of inventing a fictional country name to confound friends Leighton assumed it was made up. Given a choice of categories company, educational institution, artist, athlete, office holder, mean of transportation, building, natural place, village, animal, plant, album, film or written work, the text refers to which one?
A:
Written Work