r/whatsthatbook↗
What's that book called?
Can't remember the title of the book you've enjoyed reading? Crowdsource it to readers on Reddit!
343k subscribers1,934 posts / mo in Sep 20261,792 authors / mosince 2013
r/whatsthatbook has 343k members (+11% over the last 12 months). It gets about 1,934 posts a month from 1,792 people. Top topics: Romance Novels, Old Books & Literature and Kids Books.
When to post on r/whatsthatbook
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How r/whatsthatbook has grown
Subscriber growth
Subscribers over time
Monthly activity
Posts, comments and authors per month
Topics and brands on r/whatsthatbook
Top topics
Share of the subreddit's posts
- Romance Novels3.4%
- Old Books & Literature2.5%
- Kids Books1.9%
- Book Requests and Identification1.8%
- NovelTitleHelp1.7%
Brands people mention
Most-mentioned brands and sites, last 12 months
- The StoryGraph
- ThriftBooks
- Fantastic Fiction
- AbeBooks
- eBay
Everything else about r/whatsthatbook
Posting rules and account requirements, how often posts get removed, who writes here (age, gender, countries), what people ask for, how they talk, and related subreddits — all in the full report.
Posts and activity for Sep 2026. Members from Reddit's subscriber counts. Read from the same data the app runs on. Our research