Groucho Marx, Master Detective is a 6-book series with 6 primary works first released in 1998 with contributions by Ron Goulart.
#1 of 6 in Groucho Marx, Master Detective
1998 • 4 Readers • 262 pages • 3
#4 of 6 in Groucho Marx, Master Detective
2001 • 1 Reader
#6 of 6 in Groucho Marx, Master Detective
2005 • 1 Reader