The Mouse That Saved the West

The world is suffering from an oil crisis. Mountjoy, who's become the main protagonist of the series, feels the need to step in when he becomes personally affected.

This fourth book in the series is a bit less implausible than the second, and a bit more lively than the third; it remains a pleasant read.

Tully Bascombe, the rather likeable hero of the first book, was sidelined in the next two books, and is now unceremoniously deleted: we're told that he died ten years ago, without even a mention of what he died of. Duchess Gloriana, his wife for ten years, mentions him once with a trace of regret, but that's that. Apparently, after he led the successful invasion of the USA, the author couldn't find another use for him.