The Hub is a 8-book series first released in 1964 with contributions by James H. Schmitz.
2000 • 1 Reader • 546 pages
2000 • 5 Readers • 436 pages • 3
2001 • 1 Reader • 473 pages • 4
1973 • 1 Reader • 137 pages • 2
1973 • 1 Reader • 209 pages
1964 • 1 Reader • 181 pages • 3
2001 • 3 Readers • 766 pages • 4