A French publisher has produced a rare guide to North Korea, highlighting its history, cultural wealth and beautiful landscapes but advising tourists not to take the politically sensitive book with them.

Tourism is one of the few remaining reliable sources of foreign income for North Korea, after the U.N. imposed sanctions targeting 90 percent of its $3 billion annual exports including commodities, textiles and seafood.

Tensions over North Korea's tests of nuclear weapons and ballistic missiles spiked on the Korean Peninsula last year and there were fears of a U.S. military response to North Korea's threat to develop a weapon capable of hitting the United States.