I have been an avid reader of IB since I first read 'The Crow Road' and went on to read everything of his I could find, and was further impressed by both his mainstream and sci-fi works. It has always been a complete mystery to me why none of his books have ever won an award, he certainly deserves many in my opine, including this one. Transition is probably the best multiverse theory based book I have read to date, and fantastically combines the gritty realism of character and characterisations in his mainstream fiction with the far-reaching and richly detailed imaginarium of his sci-fi.