The seventh book in the Transylvania Series by Radu Cinamar feature a 
mission through the Third Tunnel located in the chamber beneath the 
Romanian Sphinx in the Bucegi Mountains.  The Third Tunnel leads to to a
 chamber in Iraq where Radu and his mentor, Cezar Brad, recover a 
mysterious crystal that is an integral part of a chair device in the 
Iraq chamber which facilitates extended perception for the individual 
using it.  The crystal itself is etheric because it does not exist in a 
physical form in this universe. Outside the confines of Department Zero,
 Radu has the idea to build a chair device using this crystal which will
 facilitate his intuition and influence his ability to “see” beyond the 
veil so to speak. It is a highly complicated and involved undertaking, 
and Cezar is very supportive, but it is done outside the parameters of 
their regular duties in Department Zero, Romania’s most secret 
intelligence service, as they do not believe their undertaking would be 
credible enough to receive funding. Accordingly, they use Elinor’s 
basement of the mysterious and enigmatic alchemist , Elinor, who was 
introduced in the second book of the series, "Transylvanian Moonrise". As the chair
 device is perfected, Radu explores exalted states of consciousness that
 involve a secret base in the United States and one on the Moon.  
Eventually, he learns the history of the Moon itself and how it came to 
be the unique satellite of Earth that fosters the evolution of life on 
our planet.

The Etheric Crystal — The Third Tunnel PDF

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