Encyclopedia Brown is a 11-book series with 11 primary works first released in 1963 with contributions by Donald J. Sobol and Warren Chang.
1963 • 26 Readers • 128 pages • 4
1974 • 1 Reader • 73 pages
1985 • 3 Readers • 96 pages • 4
1990 • 1 Reader • 48 pages
1998 • 2 Readers • 81 pages
2010 • 1 Reader • 84 pages
2012 • 1 Reader • 96 pages