Welcome to Ramisis, the second puzzle in the ground-breaking Isis series, as featured on BBC2's Dragon's Den. Possibly the most difficult puzzle in existence. Now it's your turn to put the theory to the test.

Rotate the pyramid layers in a unique way to release the key chamber within. The Ramisis contains the 2nd key required to open the box containing the final puzzle in the (IAS) Isis adventure Series, planned for 2015

Every Ramisis puzzle is unique, and handmade by precision engineers. It also looks and feels beautiful, and comes in a solid luxury wooden box. So, let your Isis Adventure continue ...

New 2nd generation Ramisis available March 2012 - Pre-orders now available on the signature Ramisis