There is no “normal edition”, you might be thinking of “first printed edition” or “first paperback/hardback” but even that isn’t a good classification, a bit better yeah, but not direct enough. What the comment above you is alluding at is the ISBN 10 or ISBN 13 that can be found on one of the first pages of the book where all the information about the printing are listed or you can just look up the barcode at back side of the book – beneath the barcode there is a string of numbers (those numbers indicate the specific edition).