Lazarus Long is a 8-book series first released in 1958 with contributions by Robert A. Heinlein, Giacomo Fecarrotta, and Pietro Cheli.
1958 • 1 Reader • 236 pages
1985 • 1 Reader • 440 pages • 2
1958 • 37 Readers • 234 pages • 3.8
1985 • 55 Readers • 388 pages • 2.9
1980 • 38 Readers • 511 pages • 2.7
1973 • 98 Readers • 641 pages • 3.5
1987 • 3 Readers • 438 pages