---
product_id: 658096437
title: "Book of Secrets 3D Wooden Puzzles for Adults - Mechanical 3D Puzzle Model Kit - Brain Teaser Puzzles for Adults, DIY Adult Craft Model Building Kits, Wood Puzzle Box, Gift Hobby Set"
brand: "ugears"
price: "574 Lei"
currency: RON
in_stock: true
reviews_count: 8
category: "Ugears"
url: https://www.desertcart.ro/products/658096437-book-of-secrets-3d-wooden-puzzles-for-adults-mechanical-3d
store_origin: RO
region: Romania
---

# Customizable 3-digit lock 263 laser-cut pieces Smooth mechanical gears Book of Secrets 3D Wooden Puzzles for Adults - Mechanical 3D Puzzle Model Kit - Brain Teaser Puzzles for Adults, DIY Adult Craft Model Building Kits, Wood Puzzle Box, Gift Hobby Set

**Brand:** ugears
**Price:** 574 Lei
**Availability:** ✅ In Stock

## Summary

> 🔐 Unlock curiosity, craft mystery, and own the ultimate desk statement.

## Quick Answers

- **What is this?** Book of Secrets 3D Wooden Puzzles for Adults - Mechanical 3D Puzzle Model Kit - Brain Teaser Puzzles for Adults, DIY Adult Craft Model Building Kits, Wood Puzzle Box, Gift Hobby Set by ugears
- **How much does it cost?** 574 Lei with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.ro](https://www.desertcart.ro/products/658096437-book-of-secrets-3d-wooden-puzzles-for-adults-mechanical-3d)

## Best For

- ugears enthusiasts

## Why This Product

- Trusted ugears brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Lock Down Your Secrets:** Set your own 3-digit code and unlock a hidden compartment—security meets style.
- • **Precision Craftsmanship:** 263 laser-cut pieces with waxed gears ensure silky smooth mechanical movement without glue or tools.
- • **Engaging Build Experience:** Medium difficulty level challenges your focus and patience, delivering a deeply rewarding DIY project.
- • **Intricate Engineering Meets Artistry:** Steampunk-inspired dual-tone wood design that’s a conversation starter on any desk or shelf.
- • **Perfect Gift for the Thoughtful Millennial:** A unique blend of brain teaser, décor, and keepsake box that elevates your creative space.

## Overview

The UGEARS Book of Secrets is a 3D wooden mechanical puzzle featuring 263 precision laser-cut pieces, a customizable 3-digit lock, and smooth waxed gears. Designed with a steampunk aesthetic, it doubles as a functional secret compartment and an elegant décor piece. This medium-difficulty DIY kit requires no glue or extra tools, making it a perfect brain teaser and gift for adults seeking a creative and rewarding hands-on experience.

## Description

Product description Book of Secrets 3d wooden puzzles for adults Store Your Secrets Inside Keep your treasures out of sight - letters, jewelry or special memories - safely stored inside. A signature piece from the Ugears 3D wooden puzzles for adults collection, blending mystery and craftsmanship. Interactive Locking Switch Flip the mechanical lever to activate or close the safe Interactive Locking Switch Flip the mechanical lever to activate or close the safe Rotating Safety Key Control the locking mechanism manually with this engraved key Rotating Safety Key Control the locking mechanism manually with this engraved key Customizable 3-Digit Code Set your own combination to keep your secrets safe Customizable 3-Digit Code Set your own combination to keep your secrets safe Steampunk-Inspired Cover Dual-tone plywood with elegant curves and cutouts - beauty meets function Steampunk-Inspired Cover Dual-tone plywood with elegant curves and cutouts - beauty meets function Intricate Gears. Real Mechanics. Any advice on assembly? Press parts from the side with thicker cut lines when removing them from pre-cut boards Check and sand gears for burrs to prevent jamming Wax all moving parts for smoother operation Stretch rubber bands to fit them into small openings Any advice on assembly? Press parts from the side with thicker cut lines when removing them from pre-cut boards Check and sand gears for burrs to prevent jamming Wax all moving parts for smoother operation Stretch rubber bands to fit them into small openings Do I need any tools to assemble Ugears models? Everything needed for assembly is in the box Ugears models don’t need extra tools or glue If you prefer, you can use your own tools A modeling knife can help with removing pieces or smoothing, but we provide punch pieces and sandpaper for these tasks Do I need any tools to assemble Ugears models? Everything needed for assembly is in the box Ugears models don’t need extra tools or glue If you prefer, you can use your own tools A modeling knife can help with removing pieces or smoothing, but we provide punch pieces and sandpaper for these tasks Spare and replacement parts for Ugears mechanical models Spare parts are included for components used multiple times. If you break any unique pieces, you can request free replacements, and we’ll send them to you at no cost. Spare and replacement parts for Ugears mechanical models Spare parts are included for components used multiple times. If you break any unique pieces, you can request free replacements, and we’ll send them to you at no cost. What if I have more questions about assembling the models? You can check out the video instructions above If you have any questions, feel free to reach out via email The Ugears Service Team will be happy to provide tips, explanations, troubleshooting, or other help with the assembly What if I have more questions about assembling the models? You can check out the video instructions above If you have any questions, feel free to reach out via email The Ugears Service Team will be happy to provide tips, explanations, troubleshooting, or other help with the assembly MORE UGEARS MODELS UGEARS Book of Secrets Lighthouse of Alexandria Split Rock Lighthouse UGEARS Tellurion UGEARS Dream Cabriolet

Review: Love it - Looks good. Had fun building it. And everything functions properly
Review: Fun build - Very pleased with end result. Take your time, focus on the details and have fun!

## Features

- Intriguing Steampunk Design: This 3d puzzles for adults blends artistry and engineering - an adult puzzle styled as a book, with dual-tone wood and hidden gears for a stunning display
- Secure Your Secrets: Among the most clever model kits for adults, our 3-d puzzles features a customizable 3-digit lock, hidden key, and multi-step sequence to access the secret compartment
- Precision Craftsmanship: One of the most intricate DIY kits for adults, with 263 laser-cut pieces, wax and sandpaper for smooth gear movement and long-lasting mechanical function
- Engaging & Rewarding Build: One of the most captivating models for adults to build - this medium-difficulty project requires focus, patience and delivers a deeply satisfying result
- Perfect Gift & Conversation Piece: A standout among wooden 3d puzzles for adults, this mechanical book box stores small treasures and elevates any shelf, desk or reading nook

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0D9KZ13Z7 |
| Additional Features | Portable |
| Age Range Description | Adult |
| Best Sellers Rank | #30,736 in Toys & Games ( See Top 100 in Toys & Games ) #1,626 in Puzzles (Toys & Games) |
| Brand Name | UGEARS |
| Color | Dark and Light Wood |
| Customer Reviews | 4.4 out of 5 stars 244 Reviews |
| Educational Objective | Brain Teaser, Hand-Eye Coordination, Logical Thinking |
| Included Components | Plywood, metal spring fabric, sand paper, candle wax |
| Item Dimensions | 7.36 x 6.69 x 0.04 inches |
| Item Dimensions L x W | 7.4"L x 6.7"W |
| Item Shape | Book |
| Item Type Name | 3D wooden puzzle for adult |
| Item Weight | 0.79 Kilograms |
| Manufacturer | UGEARS |
| Manufacturer Maximum Age (MONTHS) | 1200 |
| Manufacturer Minimum Age (MONTHS) | 168 |
| Manufacturer Warranty Description | No Warranty |
| Material Type | Engineered Wood |
| Model Number | 4820184122321 |
| Number of Items | 1 |
| Number of Pieces | 263 |
| Operation Mode | Manual |
| Play Activity Location | Tabletop |
| Power Source | Manual |
| Puzzle Type | 3D Puzzle |
| Size | 3.82 x 2.6 x 3.86 inches |
| Skill Level | Medium |
| Theme | Book |

## Images

![Book of Secrets 3D Wooden Puzzles for Adults - Mechanical 3D Puzzle Model Kit - Brain Teaser Puzzles for Adults, DIY Adult Craft Model Building Kits, Wood Puzzle Box, Gift Hobby Set - Image 1](https://m.media-amazon.com/images/I/71Gou23sA+L.jpg)

## Questions & Answers

**Q: Any advice on assembly?**
A: Press parts from the side with thicker cut lines when removing them from pre-cut boards Check and sand gears for burrs to prevent jamming Wax all moving parts for smoother operation Stretch rubber bands to fit them into small openings

**Q: Do I need any tools to assemble Ugears models?**
A: Everything needed for assembly is in the box Ugears models don’t need extra tools or glue If you prefer, you can use your own tools A modeling knife can help with removing pieces or smoothing, but we provide punch pieces and sandpaper for these tasks

**Q: Spare and replacement parts for Ugears mechanical models**
A: Spare parts are included for components used multiple times. If you break any unique pieces, you can request free replacements, and we’ll send them to you at no cost.

**Q: What if I have more questions about assembling the models?**
A: You can check out the video instructions above If you have any questions, feel free to reach out via email The Ugears Service Team will be happy to provide tips, explanations, troubleshooting, or other help with the assembly

## Customer Reviews

### ⭐⭐⭐⭐⭐ Love it
*by J***T on October 9, 2025*

Looks good. Had fun building it. And everything functions properly

### ⭐⭐⭐⭐⭐ Fun build
*by M***. on January 5, 2026*

Very pleased with end result. Take your time, focus on the details and have fun!

### ⭐⭐⭐⭐⭐ Utterly incredible
*by I***D on August 19, 2025*

This is one of the finest artifacts of human ingenuity that I have ever had the pleasure of experiencing. Not only is this stupendously clever in its design, great fun to assemble, and also extremely well engineered (especially given it is made out of wood!)... but it is also a wonderfully entertaining and genuinely useful keepsake for a child to keep their secret things safe :)

## Frequently Bought Together

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*Product available on Desertcart Romania*
*Store origin: RO*
*Last updated: 2026-03-02*