Pierścień Mroku is a 3-book series with 3 primary works first released in 1993 with contributions by Nick Perumov, Eugeniusz Dębski, and Ewa Dębska.
1993 • 4 Readers • 481 pages • 2.8
1993 • 3 Readers • 669 pages • 1.7
1995 • 3 Readers • 517 pages • 1.3