
A Riddle in Ruby
by Davis, Kent
Last checked: May 12, 2026
Hidden GemHighly rated but flying under the radar. Fewer readers have found this one yet.While not the biggest discount we've seen for this book, it's still a great deal and we recommend grabbing it before price returns to its normal range.
Price range: $0.50 – $7.59
0 readers are tracking this book's price
Fans of these authors will like this...
- Jonathan Stroud
- Diana Wynne Jones
- Terry Pratchett
Fans of these books will like this...
- The Amulet of Samarkand
- Howl's Moving Castle
- Septimus Heap: Magyk
Perfect for you if...
- You love witty, fast-paced adventures with clever protagonists who don't take themselves too seriously.
- You're after middle grade fantasy that treats young readers as smart, with layered plots and characters who actually surprise you.
- You enjoyed Jonathan Stroud or Septimus Heap and want more of that particular blend of humour, mystery, and inventive world-building.
Maybe not for you if...
- You prefer straightforward narratives without intricate plotting or multiple threads weaving together.
- You're looking for high-stakes emotional drama or darker fantasy themes—this skews lighter and more adventure-focused.
- You want a standalone story rather than investing in a trilogy.
About this book
Get the best deal every time
We track price drops, sale patterns, and predict when this book will go on offer next.
Price History
Kindle price over time. Green zones = periods when the book was free.
Price has dropped 19 times over the last 2 years. Goes on sale roughly every 39 days. Typically stays discounted for 35 days.
Sales Rank
Amazon sales rank: lower number = better selling book. #1 is the bestseller.
Currently around #2,355K in the Kindle store — a niche title. Climbing the charts — 27% improvement recently.
Rating & Reviews
Purple line = star rating over time. Blue area = total review count growth.
Currently 4.2★ from 46 reviews
Review activity has been quiet recently. Rating has remained stable at 4.2 over the tracking period.
Sale Prediction
Actual Predicted
Based on past patterns, a price drop could happen soon. It typically goes on sale every 39 days and the last drop was 61 days ago. Typical discount: 93% off.
Prices shown in USD from Amazon US. We continuously pull new data to improve tracking. If dates look old, it usually means there has been no significant change since the last data point.
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