DESPITE enjoying the dubious reputation of being WH Smith's most shoplifted author, Terry Pratchett is a publishing phenomenon. Guards! Guards! is just one of the 21 Discworld novels that has been translated into 26 languages before readers buy the

T-shirt, play the computer game, and polish the figurine.

Only natural then, that Pratchett has a crack at the stage with an adaptation of Guards! Guards! boasting his trademark mix of fantasy, sci-fi, folklore, and humour. Replete with dragons, dwarfs, and an orang-utan that communicates via charades, Guards! Guards! is nothing if not lively. Unfortunately, this is as good as it gets as the viewer ends up wondering if they have wandered into a pantomime come early by mistake.

Set in the city of Ankh-Morport, where citizens more or less please themselves as far as matters of law and order are concerned, Paul Darrow struggles manfully as whisky-loving cop Captain Vimes, charged with rescuing the city from an evil dragon. This is completely overshadowed by every trick in the Vaudeville book - a one-paced direction, incredibly obvious special effects, and a cast flaunting themselves as extras from the death-bed of the Carry On series. Pratchett will go down in the history of contemporary fiction on the back of his rich imagination and Python-esque humour, but on stage the magic of fantasy is lost and the play falls flat; to enjoy this you must surely be a legal (or otherwise) purchaser of his books.

n At His Majesty's, Aberdeen to Saturday, and Edinburgh King's Theatre for a week from Monday.