Each set consists of 8 mini-comics. These were available from Wheaties in exchange for 15 cents plus a Wheaties box top for a set (A box advertising the promotion along with a complete set of Disney masks part of parallel promotion with Disney are also available in this auction.Click here). This lot includes all four 8 book sets, two of which are in the original envelope General Mills shipped them in. The lot also includes an extra set D book 8 Minnie Mouse Girl Explorer comic. Already difficult to find all 4 sets complete in the same place, having shipping envelopes also makes this something you're not going to see again any time soon!