Callahan's is a 11-book series with 11 released primary works first released in 1977 with contributions by Spider Robinson and Barrett Whitener.
#1 of 11 in Callahan's
1977 • 50 Readers • 224 pages • 3.8
#2 of 11 in Callahan's
1981 • 14 Readers • 256 pages • 3.4
#5 of 11 in Callahan's
1992 • 3 Readers • 352 pages • 3
#2 of 2 in Mary's Place
1996 • 4 Readers • 214 pages • 3.3
#2 of 2 in The Place
2003 • 4 Readers • 286 pages • 4
11 Callahan's
1994 • 1 Reader • 5