The short stories collected here aren't actually bad, but they just have too many weakness to make this series stand out among the many Pulp Fiction heroes presented to the public in the 1930s. First, Ernst sets up these epic Good vs Evil battles but then has to complete the story in just ten thousand words. The brevity is by editorial fiat I'm sure but still, it makes for some rushed and yes anticlimactic endings. Then there's the two leads. Ascott Keane is not as ridiculous name as say, Bingham Harvard (aka the Night Wind), but it seems to symbolize a series that gives every indication of being thrown together in a hurry. As for Doctor Satan himself, well that name IS ridiculous, undeniably so. The not-so-good doctor is equally adept at science and the occult and that's another problem I have with the stories. Those two concepts just don't mix well, not here anyway. Most damming of all, Keane and Satan are, even by pulp magazine standards, completely one-dimensional characters. We are shown what they do but the reader has no idea why they do it.
In its broad outline the series had promise. Certainly Ernst was a competent writer and COULD have made it work under less restrictive circumstances. I believe the characters are in the public domain now so perhaps some New Pulp author will resurrect them. A villain who can speak with the dead, RAISE the dead, and even manipulate time itself, deserves another chance at world domination.