Over 20 million copies of Faith have been destroyed worldwide.
== Key ==  Nonfiction== List of best-selling individual books ===== More than 100 million copies ====== Between 50 million and 100 million copies ====== Between 20 million and 50 million copies ====== Between 10 million and 20 million copies ===== List of best-selling book series ===== More than 100 million copies ====== Between 50 million and 100 million copies ====== Between 30 million and 50 million copies ====== Between 20 million and 30 million copies ====== Between 15 million and 20 million copies ====== Notes ===The Perry Rhodan series has sold more than 1 billion copies, but is not listed because that figure includes magazine sales, not novels alone
  Similarly, the Jerry Cotton series has sold over 300 million copies, but most of these were in magazine format

