The style of this book is very much that of 1066 And All That, with its schoolboy humour:
Variation: The sort of tune written by composers who can never make up their minds.
occasional drifts into Pseud's Corner:
Exposition: In a fugue, the exposition is the musical equivalent of having wallpaper that matches the furniture.
and some that are just brilliant:
Glissando: The musical equivalent of stepping on a banana peel.