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
2000
2014
2017
1998
2010
2009
2001
2025
2020
1939
1955
1950
2021
1951
2013
