Sean Dillon is a 18-book series with 18 primary works first released in 1992 with contributions by Jack Higgins.
1992 • 3 Readers • 368 pages • 4.5
1994 • 1 Reader • 300 pages
1995 • 2 Readers • 352 pages
2001 • 2 Readers • 341 pages
2002 • 1 Reader • 311 pages
2004 • 1 Reader • 273 pages
2005 • 1 Reader • 324 pages
2012 • 2 Readers • 336 pages
2013 • 1 Reader • 352 pages
2016 • 1 Reader • 310 pages • 4