A very funny story.
Author's Foreword: "...The great heroes and great villains of the
pulp-magazine era would be old men, old indeed, if they were still
living. But it's sad to think of them dying with their boots off, their
careers uncompleted, decaying into senility, blind, deaf, noses
running, salivating, dirtying their sheets, babbling of green fields.
So it is only fitting that this tale have them and their days as they
lived—in the glory of their youth. This adventure contains a
certain amount of levity, but any parodying is done with love...".