I recently snagged the DCC conversion of The Dark Tower, having missed the Kickstarter, and I'm very happy with it. It includes the original dungeon as published in 1979, which makes this the third copy I own, lol! But it's a great module, and it's worth owning a third copy to get the included essays as well as the other two volumes.
The second book is a DCC conversion of the module (a 5e conversion is also available, but I don't play or run 5e), which is very nicely done (I gotta think the conversion to DCC was easier than to 5e, but that's just my assumption, I could be wrong). The third book includes three followup scenarios for The Dark Tower. I'm very excited about running all of this!