It's entirely possible the author is more familiar with a version that _does_ call it "Battleships", such as the 1987 video game: https://en.wikipedia.org/wiki/

It's entirely possible the author is more familiar with a version that _does_ call it "Battleships", such as the 1987 video game: https://en.wikipedia.org/wiki/Battleships_(video_game) https://en.wikipedia.org/wiki/Battleships_(video_game) Also FWIW I only ever hear it referred to as "Battleships" in the UK (even though most versions are called "Battleship"), and the Amazon search suggestions suggest this is common (https://i.imgur.com/WlZhNxg.png https://i.imgur.com/WlZhNxg.png), so the mistake is hardly surprising.