Hitchhiker's Guide BBC Radio Series is a 5-book series with 5 primary works first released in 1978 with contributions by Douglas Adams and Eoin Colfer.
1978 • 3 Readers • 4
1980 • 4 Readers • 4
1979 • 5 Readers • 4 pages • 5
2005 • 1 Reader • 5
2018 • 2 Readers • 4 pages