The work of Peter Ketley on Fisheries Research in Devon is being disorganised by a mysterious new method of salmon poaching. His young brother Bob, with the help of two children from London, eventually uncovers and catches the poachers.
2019
2010
2017
1955
2009
1957
1998
2021
1939
2001
2020
2000
1940
2025
2013
1994
1950
1967
