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Mysteries & Detectives (Children's Books, Books): Amazon KDP category data
Amazon Books Best Sellers data for Mysteries & Detectives (Children's Books, Books), updated Nov 2, 2026: median price $8.09, median 2,586 reviews, average rating 4.7 and a KDPTop opportunity score of 22/100 (highly competitive).
| Price range (middle 50%) | $6.99 – $11.10 |
|---|---|
| Average rating | 4.7 |
| New releases (90 days) | 5% |
| Books on the list | 100 |
| Store | Books |
What stands out
- Its review barrier is higher than in 94% of Books categories: the median best seller has 2,586 reviews, so new books need time to build up.
- Its median reviews are 27% of the parent category Children's Books (9,560), one of the easier corners under it.
- At $8.09 its median price is below 95% of Books categories, so it is a volume game.
Top 10 Mysteries & Detectives best sellers
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Who Pooped on Me?
- List rank#3
- Price$2.99
- Rating4.5
- Reviews6,830
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Warriors Box Set: Volumes 1 to 6: The Complete First Series (Warriors: The Prophecies Begin)
by Erin Hunter
- List rank#4
- Price$21
- Rating4.8
- Reviews9,728
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Mission in Mount Rainier National Park (National Park Mystery Series)
- List rank#5
- Price$14.99
- Rating4.8
- Reviews177
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The Westing Game (Puffin Modern Classics)
by Ellen Raskin
- List rank#6
- Price$6.98
- Rating4.4
- Reviews9,173
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Mystery In Rocky Mountain National Park (National Park Mystery Series)
- List rank#7
- Price$8.70
- Rating4.7
- Reviews2,424
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The Lemonade War: Siblings Evan and Jessie wage a five-day lemonade-stand rivalry―a witty, heartfelt tale of math, business, and family for ages 8-12. (The Lemonade War Series, 1)
- List rank#8
- Price$6.27
- Rating4.7
- Reviews4,952
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The Boxcar Children Mysteries Boxed Set 1-4: The Boxcar Children; Surprise Island; The Yellow House; Mystery Ranch
- List rank#9
- Price$15
- Rating4.8
- Reviews8,899
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Warriors Graphic Novel: The Prophecies Begin, Part Two of Three: An Instant NYT Bestselling Fantasy Graphic Novel for Children (Ages 8–12)
by Erin Hunter
- List rank#10
- Price$8.88
- Rating4.8
- Reviews2,852
Same niche in Kindle eBooks: Mysteries & Detectives
FAQ
Is Mysteries & Detectives a good niche for Amazon KDP?
Its KDPTop opportunity score is 22/100, which makes it highly competitive. The median best seller has 2,586 reviews and sells for $8.09.
How many reviews do you need to rank in Mysteries & Detectives?
The median best seller has 2,586 reviews, and 2% of them have fewer than 100.
What do Mysteries & Detectives best sellers cost?
The median price is $8.09; half of the best sellers are priced between $6.99 and $11.10.
Can new books break into Mysteries & Detectives?
5% of the current best sellers were released in the last 90 days.
About this data
Data comes from KDPTop's daily crawl of Amazon's public Best Sellers pages; medians use the latest list. The opportunity score (0–100, higher is easier to enter) combines the review barrier, the share of low-review books, list turnover, new-release share and price.