Twin Thriller Promotional Mail-In Packet
(Click on any image below to see full-sized)
(Click on any image below to see full-sized)
These editions were published featuring two Nancy Drew titles
in one book. The cover for the twin thrillers used the artwork
from one of the two books that were used in the set, with the exception of the first edition. They were only offered through a mail-in offer, not in bookstores. To see the promotional mail-
order packet, scroll to the bottom of the page.