Greater Foundation Universe is a 21-book series with 14 primary works first released in 1950 with contributions by Isaac Asimov, Aline Storto Pereira, and 10 others.
1952 • 2 Readers • 202 pages • 5
1952 • 286 Readers • 200 pages • 3.9
1953 • 1 Reader • 3
1982 • 1 Reader • 496 pages • 5
1953 • 1 Reader • 347 pages • 5
1964 • 40 Readers • 556 pages • 3.8
1982 • 1 Reader • 828 pages • 4
1953 • 1 Reader • 203 pages • 5