Metro is a 4-book series with 4 primary works first released in 2002 with contributions by Mike Chapple, Debra Littlejohn Shinder, Dmitry Glukhovsky, and Дмитрий Глуховский.
2002 • 2 Readers • 580 pages • 4
2009 • 86 Readers • 464 pages • 3.2
2015 • 2 Readers • 698 pages • 5
2012 • 1 Reader • 19 pages • 1