Thank you, Midnite, I hope you didn't spend too much time looking up this information.
I went to amazon and placed a new order.
I wanted to see for sure which version I had ordered previously but could find no record of the order on amazon. I remember having deleted the recent notice they sent me -- after so much time I had pretty much forgotten and given up on it so I didn't even pay too much attention -- but I tried going through my e-mail messages and "trash" anyway. No luck. So I went back to amazon and did some more checking -- all my orders placed in the past six months, view of my past orders by item, you name it -- there was no record of it. REALLY DETERMINED now, I did a search through hoards of old e-mails and finally found a confirmation message of my original order that I hadn't deleted -- I placed the order on February 25. You could click on the order number to take you to the order on amazon's website -- but there, I just got a message saying "order cancelled" with no detail or further information. And the original order confirmation e-mail gives no details on the edition, only the title, author, and price -- which was $14.95.
I guess it doesn't really matter, especially now that I know I'm NOT crazy, that I really HAD ordered the book! (Well, I suppose I could still be crazy and have ordered the book ... )
It does irritate me slightly, though, that amazon sent a message to me -- I'm guessing within the last two weeks -- saying that the item was unavailable -- when it IS available!