
I went to Amazon, and pulled up several volumes. Some were still available through Amazon direct, and some through online book dealers using the Amazon Marketplace. Click on the cover art for the Applewood edition of "The Mark on the Door" featured on Amazon.
If you look at the Marketplace dealers there seem to be many. A company called Any_Book shows that they are selling a copy for 7.07 new. I should have been suspicious, but I was on the right page, and generally Amazon is reliable.
Imagine my surprise when my copy arrived yesterday and it was just a Flashlight edition I could have bought at WalMart. I contacted the company immediately, and they apologized, saying there must have been a mix up at their factory. They said I could send the item back for a full refund, something I intend to do.
So check before you buy, and be wary of low priced items. It seems when prices are too good to be true, they often are!!