Perhaps eyeing the success of the DC horror/fantasy anthology titles
House Of Secrets and
House Of Mystery, Marvel launched two similarly themed books in late 1969:
Tower Of Shadows and, one month later,
Chamber Of Darkness. Like their DC counterparts which were published on a bimonthly basis (off and on), both
Tower and
Chamber hit the stands every other month--but it seems the similarity ends there in terms of sales, as Marvel's offerings sold poorly and were discontinued after ten and eight issues, respectively.
Tower, premiering first, seemed somewhat better received by readers, judging by letters page response, though the ratio of raves to more critical assessments appeared to be about 30/70. There was also the question of sustainability, as both series began pulling in reprinted material from their earlier anthology titles from the '50s-'60s (
Strange Tales and
Tales Of Suspense) with their sixth issue.
Suffice to say that DC's House titles were in no danger of readers jumping ship for Marvel's offerings--though it wasn't for lack of trying on Marvel's part, at least initially, as some of the company's most notable talent were tapped to contribute stories. Roy Thomas, Jack Kirby, Stan Lee, John Buscema, Gene Colan, Len Wein, Marv Wolfman, Jim Steranko, et al. (including John Romita Sr., who mostly did cover work) were seemingly able to accommodate seven-page assignments (or less) within a two-month window (though I believe Steranko withdrew after only one story, reportedly due to a disagreement with Lee)--with some artists even pulling double duty and contributing scripts as well as art, in addition to inkers providing readers with examples of their own pencils.
After their all-too-brief runs, each title shifted to formats made up of almost entirely reprinted material, in addition to adopting new mastheads. Tower became Creatures On The Loose, which mixed its reprints with sword and sorcery tales as well as a regular feature on Man-Wolf, while Chamber morphed to Monsters On The Prowl--each book having a run of 30 to 37 bimonthly issues (the creatures pulling ahead of the monsters--make of that what you will). But since there's a little more ground to cover with both Tower and Chamber, and having already examined Jack Kirby's stories in the latter, let's turn to a few samples from some of the other names we've mentioned who made their mark in the macabre during the brief time when these two titles were being published.