hi
I have 2 books and wondered if anyone could tell me if they are likely to be first editions
1 THE FEATHER MEN - RANULPH FIENNES-BLOOMSBURY
Hardback 1991
ISBN 0747510490
10 9 8 7 6 5 4 3 2 1

2 REAPER MAN - TERRY PRATCHETT
HARDBACK 1991
ISBN 0575049790
( no numbers at all )

any help much appreciated thanks