UGEARS Book of Secrets 3D Wooden Puzzles for Adults
- 263 pieces, engineered wood
- Skill level medium, ages 14 and up
- 3.82 x 2.6 x 3.86 inches finished size
- 305 g, hidden compartment with combination lock
- Sand paper and candle wax included
Last refreshed Oct 3, 2026 · Based on the Amazon listing and published specifications, not hands-on testing.
A steampunk book-shaped puzzle box with a combination lock and a hidden compartment, built from engineered wood. Good for adult hobbyists, though there is no warranty.
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ASIN: B0D9KZ13Z7Model: 4820184122321Category: 3-D Puzzles
Overview
UGEARS turns this puzzle into a book-shaped box with a hidden compartment and a combination lock, assembled from engineered wood. Sand paper, candle wax and a metal spring fabric come in the kit.
Adults get a hands-on mechanical build that ends as a working box for small keepsakes, and the Da Vinci Code link gives it a story. The listing gives no build time and no warranty.
Who it's for
Hobbyists from fourteen up who like tabletop projects will enjoy the lock mechanism. Anyone after a casual kids' puzzle should look at an easier set.
Pros and cons
- Working combination lock
- Wooden mechanical build
- Sand paper and wax included
- Skill level medium
- Build time not listed
- Tools not listed
- Small finished size
Performance notes
Parts fit together to form a lock mechanism, and a combination opens the hidden compartment. The kit lists sand paper and candle wax with no instructions, so check the manual for how they are used.
Specifications
| Brand | UGEARS |
|---|---|
| Model | 4820184122321 |
| Dimensions & fit | |
| Size | 3.82 x 2.6 x 3.86 inches |
| Item weight | 305 g |
| Construction & materials | |
| Material | Engineered Wood |
| Color | Dark and Light Wood |
| Included components | |
| Pieces | 263 |
| Included | Plywood, metal spring fabric, sand paper, candle wax |
| Warranty & support | |
| Warranty | No Warranty |
| Other details | |
| Manufacturer recommended age | 14 years and up |
| Skill level | Medium |
Frequently asked questions
How do I care for the UGEARS Book of Secrets?
The listing names sand paper and candle wax in the kit but gives no care steps. Check the manual.
What does the combination lock do?
The title says the build is a box with a hidden compartment and a combination lock.