r/whatsthatbook
333k members
r/whatsthatbook is a subreddit with 333k members. The community frequently discusses book, ya, children, fantasy, and looking for a book, and they frequently recommend/review mystery books, book series, and guided meditations, and the most common flair used is unsolved.
Can't remember the title of the book you've enjoyed reading? Crowdsource it to readers on Reddit!
Popular Topics in r/whatsthatbook
#1
Book
261 posts
#2
Ya
86 posts
#3
Children
83 posts
#4
Fantasy
69 posts
#5
Looking For A Book
57 posts
#6
Romance
41 posts
#7
Struggling
32 posts
#8
Girl
29 posts
#9
Magic
25 posts
#10
Novel
22 posts
Products Discussed in r/whatsthatbook
Mystery Books
3 reviews
#1
Donald J. Sobol
5.0★ from 1 review
#2
Jim Sukach
5.0★ from 1 review
#3
The Mysterious Benedict Society
5.0★ from 1 review
Book Series
1 review
#1
Roland Smith
4.0★ from 1 review
Guided Meditations
1 review
#1
Maureen Garth
4.0★ from 1 review
Flair Used in r/whatsthatbook
#1
UNSOLVED
: "3 children find themselves the only survivors of a passing meteorite releasing a toxic gas and killing the entire planet by playing around with a science kit (wolf on the book cover)"
200 posts
Member Growth in r/whatsthatbook
Yearly
+37k members(12.6%)
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About
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This page gives a focused view of r/whatsthatbook, including current member size, discussion patterns, product reviews, and related communities to explore.
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Last updated: June 10, 2026