Upstream Reviews
Substacknewsletter · by Michael Gallagher
REVIEWING ONLY THE BEST IN SCI-FI, FANTASY, HORROR, MYSTERY & THRILLERS
- Audience
- Not shown publicly
- We show a dash rather than guess
- Observed frequency
- Several times a week
- From 9 posts indexed in the last 90 days
- Last post
- Nov 6, 2026
- 6 days ago
- Likely audience
- Science fiction readers
- Inferred from post content
Upstream Reviews is a Substack newsletter by Michael Gallagher covering Science Fiction Novellas, Sci-Fi World-Building and Book Review. NewsletterFIT indexed 9 posts from it in the last 90 days, most recently on Nov 6, 2026.
Topics
- Science Fiction Novellas
- Sci-Fi World-Building
- Book Review
- Action Fiction
- Dystopian Setting
Recent posts
- Review: Time…
- Review –…
- BOOK REVIEW:…
- Book Review:…
- The Horrific…
- Babylon Blues…
Sponsors detected
No sponsored posts detected in the last 180 days of indexed posts.
Detected automatically from posts marked as sponsored. Detection can miss or misread placements.
See the full picture on Upstream Reviews
Subscriber momentum over time, every detected sponsor with the source post, companies and people it mentions, guests, and an alert when any of it changes.
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Compiled from public pages · refreshed Nov 8, 2026 · How NewsletterFIT collects and labels data