Original: The books were: Warship (published in 1973) HMS Hero (published in 1976) Holt RN (published in 1977) Board game Series creator Ian Mackintosh also devised a version of the board game Battleships, based on his experience of modern naval tactics and called Warship after the series.
Simplified: The books were: Warship (published in 1973); HMS Hero (published in 1976); and Holt RN (published in 1977).