The Omen is a 5-book series with 5 primary works first released in 1976 with contributions by David Seltzer, Joseph Howard, Michael Hodges, and Gordon McGill.
1978 • 3 Readers • 199 pages • 3
1980 • 4 Readers • 190 pages • 2.5
1982 • 2 Readers • 216 pages • 2
1985 • 3 Readers • 224 pages • 3