Ariadne Oliver is a 8-book series with 8 primary works first released in 1934 with contributions by Agatha Christie.
1934 • 37 Readers • 192 pages • 4
1936 • 130 Readers • 192 pages • 3.7
1942 • 63 Readers • 238 pages • 3.6
1956 • 79 Readers • 240 pages • 3.9
1961 • 55 Readers • 292 pages • 3.7
1966 • 74 Readers • 190 pages • 3.6
1963 • 201 Readers • 8 pages • 3.4
1972 • 80 Readers • 3.4