Put me together. Discover my secret before you entrust me with yours. Simply lock away secret notes, valuable treasures or other personal items with the Book of Secrets and keep them away from prying eyes. This wonderful 3D wooden puzzle is a steampunk casket in the shape of a book with a combination lock, a secret compartment, a multi-step opening process and a fantastic mechanism. You open your book of secrets by entering a three-digit combination into the spine of the book to unlock the secret key. Insert the key into the special slot and turn it anti-clockwise to activate the opening mechanism. Then turn the cogwheels anti-clockwise and finally open the book. Several windows on the box will show you whether you have carried out the individual steps correctly. This mechanical 3D secret box with its complex opening sequence is full of mysteries and is both a fun way to store things and a fun game where you can challenge friends and family to solve the riddles of the Book of Secrets.
Put me together. Discover my secret before you entrust me with yours. Simply lock away secret notes, valuable treasures or other personal items with the Book of Secrets and keep them away from prying eyes. This wonderful 3D wooden puzzle is a steampunk casket in the shape of a book with a combination lock, a secret compartment, a multi-step opening process and a fantastic mechanism. You open your book of secrets by entering a three-digit combination into the spine of the book to unlock the secret key. Insert the key into the special slot and turn it anti-clockwise to activate the opening mechanism. Then turn the cogwheels anti-clockwise and finally open the book. Several windows on the box will show you whether you have carried out the individual steps correctly. This mechanical 3D secret box with its complex opening sequence is full of mysteries and is both a fun way to store things and a fun game where you can challenge friends and family to solve the riddles of the Book of Secrets.
Book of Secrets
Put me together. Discover my secret before you entrust me with yours. Simply lock away secret notes, valuable treasures or other personal items with the Book of Secrets and keep them away from prying eyes. This wonderful 3D wooden puzzle is a steampunk casket in the shape of a book with a combination lock, a secret compartment, a multi-step opening process and a fantastic mechanism. You open your book of secrets by entering a three-digit combination into the spine of the book to unlock the secret key. Insert the key into the special slot and turn it anti-clockwise to activate the opening mechanism. Then turn the cogwheels anti-clockwise and finally open the book. Several windows on the box will show you whether you have carried out the individual steps correctly. This mechanical 3D secret box with its complex opening sequence is full of mysteries and is both a fun way to store things and a fun game where you can challenge friends and family to solve the riddles of the Book of Secrets.
Put me together. Discover my secret before you entrust me with yours. Simply lock away secret notes, valuable treasures or other personal items with the Book of Secrets and keep them away from prying eyes. This wonderful 3D wooden puzzle is a steampunk casket in the shape of a book with a combination lock, a secret compartment, a multi-step opening process and a fantastic mechanism. You open your book of secrets by entering a three-digit combination into the spine of the book to unlock the secret key. Insert the key into the special slot and turn it anti-clockwise to activate the opening mechanism. Then turn the cogwheels anti-clockwise and finally open the book. Several windows on the box will show you whether you have carried out the individual steps correctly. This mechanical 3D secret box with its complex opening sequence is full of mysteries and is both a fun way to store things and a fun game where you can challenge friends and family to solve the riddles of the Book of Secrets.
in 25 offers
The lowest price for Book of Secrets right now is $70.95 at Kmart, compared across 17 retailers.
The all-time low was $60.45 on 2 Aug 2026 — today's price is 17% above the lowest ever. That's a little above the best price we've seen.
Prices last updated 19 Oct 2026.
Last updated at 19/10/2026 12:44:14
UGEARS Book of Secrets
Free delivery
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UGears Book of Secrets Model Kit
Free delivery between Tue – Wed
UGears Book of Secrets Model Kit
Delivery by Wed $6.80
UGears Book of Secrets Model Kit
Delivery $9.60
Ugears Book Of Secrets Model Kit
Free delivery
Affiliate Disclosure: We may receive a small commission for purchases made through this link at no extra cost to you. This helps support our site. Thank you!
Ugears Book Of Secret Construction Game Brown Kids
Delivery $29.49
Book of Secrets
Delivery $14.90
UGears Book Of Secrets Model Kit
Delivery between 22–28 Oct $9.95
UGears Book of Secrets | Hobbyco - Est.1935
Delivery $9.90
Ugears 3D Wooden Model Book of Secrets Puzzle Gift Mechanical Kit STEM 70265
Free delivery
| Difficulty Level | Medium |
| Number Of Pieces | 263 |
| Theme | Steampunk |
| Type | 3D Puzzle |
| Recommended Age | 14+ |
UGEARS Book of Secrets
Free delivery
Affiliate Disclosure: We may receive a small commission for purchases made through this link at no extra cost to you. This helps support our site. Thank you!
UGears Book of Secrets Model Kit
Free delivery between Tue – Wed
UGears Book of Secrets Model Kit
Delivery by Wed $6.80
UGears Book of Secrets Model Kit
Delivery $9.60
Ugears Book Of Secrets Model Kit
Free delivery
Affiliate Disclosure: We may receive a small commission for purchases made through this link at no extra cost to you. This helps support our site. Thank you!
| Difficulty Level | Medium |
| Number Of Pieces | 263 |
| Theme | Steampunk |
| Type | 3D Puzzle |
| Recommended Age | 14+ |
