Partly on the back of the justly-celebrated film of his 1995 masterpiece 'The Prestige', Chris Priest has recently been receiving something a little bit closer to the amount of attention and praise his work deserves. If you've enjoyed other Priest books, you owe yourself a copy of the majestic invention that is 'Inverted World'. High-concept SF can be a joy if undertaken by experts and 'Inverted World' is built around the 'highest' concept SF has seen for a very long time. While coming up with the notion of a world shaped like a hyperboloid with infinite limits at its poles and equator seems difficult enough, putting that notion to work in a compelling fiction seems a harder thing still. And yet Priest pulls it off: the world of his slightly dissociated exploratory Guildsman, Helward Mann, proves to be inverted in more ways than one and to reflect an odd light back on what we take to be our world. Without giving too much away, fans of later Priest books like 'The Affirmation' and 'The Prestige' will find in 'Inverted World' an early but powerful use of many of Priest's most interesting and enduring concerns. Incidentally, the NYRB Classics edition of 'Inverted World' contains a short but significant 'Prologue' which (I think) has never been printed in any of the many British editions that the novel has clocked-up since its initial publication in 1974. (Certainly the 'Prologue' doesn't appear in my old, beloved, 1986 Gollancz edition or the edition in Vol. 2 of the 1999 Christopher Priest omnibus.) The NYRB edition also has an engaging and informative afterword from John Clute, who relates 'Inverted World' usefully to Priest's other works and British SF as a whole. So this edition is well worth acquiring even if you're already a fan.