ISBN numbers, editions

[Kelley]

No: HPFGUIDX 3963

--- In HPforGrownups at egroups.com, "Firebolt" <particle at u...> wrote:
> On the same line as the Printed in the USA line, there should be a 
number,
> like 56 or 37 or 23 or whatever. I think that's what Susan means...
> 
> ~Firebolt

Thanks, Firebolt.  Strangely, mine has no number there.  Does anyone 
know what this means?  Maybe after the 50th printing they stop 
including the edition number, or something like that?  I can't figure 
it out, and have no idea. 

Kelley