If you were riveted by how Time Machines traces the arc from Hugo Gernsback launching Amazing Stories in 1926 to John W. Campbell reshaping Astounding in the late ’30s, you’ll love how Astounding dives even deeper. It follows Campbell’s takeover in 1937, the recruitment of Asimov, Heinlein, and van Vogt, and wartime paper shortages—many of the exact milestones Ashley spotlights—while unpacking notorious episodes like Hubbard’s rise and the fallout around “Dianetics.”

Ashley’s chapters on Gernsback’s editorial vision, the Amazing Stories letter columns that birthed fandom, and Campbell’s transformation of Astounding are the launching pads here. Trillion Year Spree gives you the bigger intellectual map—linking the very pulps Ashley chronicles (like Planet Stories and Startling Stories) to traditions from Shelley, Verne, and Wells through the Golden Age you just revisited.

If you enjoyed how Time Machines proceeds step-by-step—from pre-Amazing proto-SF through Gernsback’s 1926 launch and the spin-offs like Amazing Stories Quarterly—this book zooms in on that era with a clean, linear march. It unpacks the transition from Munsey’s magazines, Gernsback’s own “Ralph 124C 41+,” and the rise of letter columns and early fanzines you met in Ashley’s narrative.

One of the delights of Time Machines is seeing how Amazing Stories’ letter pages sparked clubs, fanzines, and conventions. The Immortal Storm gives you the on-the-ground texture of that world—the personalities, feuds, and fan organizations that grew from those same columns Ashley describes, carrying you from the first fanzines like The Comet into a sprawling subculture.

After following Ashley through Campbell’s editorial shake-ups at Astounding and touchstones like Asimov’s magazine work and van Vogt’s serials, you may want a sharp, single-volume synthesis. New Maps of Hell gives you that—witty, accessible criticism that probes the same authors and motifs (dystopias, space empires, gadget stories) you encountered in the pulps’ heyday.