Not a continuation of Skywald's earlier "Frankenstein, Book II" {although the writer/artist team are the same people who concluded that series} but rather a continuation of Hewetson's take on the character, begun in Scream #7.
About H. P. Lovecraft and the Shoggoth series. It contained a Virgil Finlay portrait of Lovecraft, a concept sketch of Cthulhu by HPL himself, a checklist of Skywald’s Shoggoth stories, and a offer for a Shoggoth crusade certificate, signed by Hewetson and others, making the reader a part of Skywald’s crusade against the Shoggoths {playing off the fact that Hewetson and other Skywald creators had been featured as protagonists in the previous Shoggoth stories}.
The script was miscredited to Tom Sutton and Dan Adkins in this reprint.