X-Factor (2005) (Collected Editions) is a 6-book series with 6 primary works first released in 2005 with contributions by Peter David, Ariel Olivetti, and Dennis Calero.
2007 • 4 Readers • 136 pages • 3.7
2009 • 1 Reader • 168 pages • 1
2010 • 3 Readers • 112 pages • 3
2011 • 3 Readers • 144 pages • 4
2012 • 3 Readers • 96 pages • 4
2013 • 2 Readers • 160 pages • 4