Two subreddit samples can discuss the same subject while distributing tracked book attention
differently. These comparisons normalize every title by its share of each sample's tracked
mentions, so a larger subreddit cannot lead merely by producing more selected rows.
The r/ExperiencedDevs and r/learnprogramming samples share some tracked book attention, then diverge around systems, interviews, and introductory technique.
The image is regenerated from the public dataset and links back to this methodology and
its exact values.
<a href="https://booksreddit.com/data/taste-atlas/#experienceddevs-vs-learnprogramming"><img src="https://booksreddit.com/data/taste-atlas/experienceddevs-vs-learnprogramming.svg?v=2026-09-02" alt="Comparison of tracked book mentions in r/ExperiencedDevs and r/learnprogramming. Weighted attention overlap is 27%. Shared attention: Clean Code, The Pragmatic Programmer, Design Patterns. r/ExperiencedDevs over-indexes on Designing Data-Intensive Applications, Staff Engineer, The Manager's Path. r/learnprogramming over-indexes on Think Like a Programmer, Structure and Interpretation of Computer Programs, Code: The Hidden Language of Computer Hardware and Software." width="1200" loading="lazy"></a>
Community comparison
r/AskHistorians vs r/history
These two history-focused subreddit samples share some mentioned titles while normalized mention share highlights where their attention differs.
The image is regenerated from the public dataset and links back to this methodology and
its exact values.
<a href="https://booksreddit.com/data/taste-atlas/#askhistorians-vs-history"><img src="https://booksreddit.com/data/taste-atlas/askhistorians-vs-history.svg?v=2026-09-02" alt="Comparison of tracked book mentions in r/AskHistorians and r/history. Weighted attention overlap is 44%. Shared attention: 1491: New Revelations of the Americas Before Columbus, Guns, Germs, and Steel, The Wages of Destruction: The Making and Breaking of the Nazi Economy. r/AskHistorians over-indexes on The History of the Decline and Fall of the Roman Empire, Postwar: A History of Europe Since 1945, Battle Cry of Freedom: The Civil War Era. r/history over-indexes on A Distant Mirror: The Calamitous 14th Century, A Peace to End All Peace, Carthage Must Be Destroyed." width="1200" loading="lazy"></a>
Community comparison
r/Stoicism vs r/philosophy
The r/Stoicism and r/philosophy samples overlap on primary texts while giving different normalized mention share to modern guides.
The image is regenerated from the public dataset and links back to this methodology and
its exact values.
<a href="https://booksreddit.com/data/taste-atlas/#stoicism-vs-philosophy"><img src="https://booksreddit.com/data/taste-atlas/stoicism-vs-philosophy.svg?v=2026-09-02" alt="Comparison of tracked book mentions in r/Stoicism and r/philosophy. Weighted attention overlap is 18%. Shared attention: Meditations, Enchiridion, Letters from a Stoic. r/Stoicism over-indexes on The Daily Stoic, Discourses, How to Think Like a Roman Emperor. r/philosophy over-indexes on The Myth of Sisyphus, Beyond Good and Evil, Thus Spoke Zarathustra." width="1200" loading="lazy"></a>
How the comparison works
For each book, its mentions in a subreddit sample are divided by all tracked book mentions in
that sample. Shared attention ranks books with the strongest minimum share across both
sides. Over-indexing ranks the largest gap between normalized shares. Weighted overlap is
the sum of the smaller shares divided by the sum of the larger shares. See the full extraction and coverage methodology before treating these subreddit samples as representative of readers generally.
