The Missing 411 books are three books by David Paulides. The first one is titled "Missing 411: the Eastern United States & Beyond". It talks about people who have disappeared in the Eastern United States without leaving much evidence behind. The book was originally released in 2011, but it's updated each year to include new cases. The second book is called "Missing 411: the Western United States & Beyond". This one talks about people who have disappeared in the Western US, often under unusual or suspicious circumstances. This was the first book that was released, back in 2012. The third book is called "Missing 411: California, Oregon & Washington". It talks about people who have disappeared in the western US. This is a travel book since it moves between each state and double-back between states as well, so it doesn't belong in any particular location. The book was released in 2013 and includes many places that you can visit while you're reading it.