Orbit, London, 1999, appears 1^st pr thus.  ISBN 1-85723-897-4.  Very large soft cover, 1396 pages.  Very good; light edge and cover wear to wrap, light creases on spine; binding sound; soil speckles on top page block, bit of soil at bottom fore-edge page block.  Interior clean and unmarked.  ‘With over 4,300 entries and more than 1.3 million words of critical insight and biographical and bibliographic data – including a new appendix of updates and revisions for this paperback edition – it is an indispensable reference work not only for every reader who loves, uses and wishes to know more about science fiction, but for every reader of imaginative fiction at the end of this century.’ (from rear wrap)