Sunday's "Daily Deal" on Logos.com, is the book "Who was Adam", by Hugh Ross.
The deal shows the sale price as $9. Selecting the link for the book shows the regular price as $18. The web page for the book then says you can get this book and save more by purchasing the nine volume "Hugh Ross Reasons to Believe" collection, for $130.
Pulling up this $130 collection shows that the cost of the nine volumes if bought separately would only be $127. Hmmm. The collection also shows the regular cost of "Who was Adam", as only being $9, versus the $18 shown when selecting the link for the Daily Deal. Hmmm, hmmm.