The Hitchhiker's Guide to the Galaxy is a 9-book series with 9 primary works first released in 1979 with contributions by Douglas Adams and Eoin Colfer.
1979 • 3,457 Readers • 215 pages • 4.2
1980 • 959 Readers • 245 pages • 4
1982 • 741 Readers • 224 pages • 4
1984 • 619 Readers • 204 pages • 3.9
1986 • 83 Readers • 11 pages • 3.4
1979 • 512 Readers • 277 pages • 3.8
2009 • 147 Readers • 275 pages • 3.2