Barsoom is a 12-book series with 10 primary works first released in 1912 with contributions by Edgar Rice Burroughs, Seppo Ilmari, and Stuart Moore.
1912 • 153 Readers • 186 pages • 3.4
1930 • 10 Readers • 239 pages • 3.8
1935 • 7 Readers • 191 pages • 3.3
1939 • 9 Readers • 160 pages • 3.5
1941 • 9 Readers • 192 pages • 3.3
2012 • 1 Reader • 557 pages • 5