No. of Recommendations: 3
I see that Amazon has a hard cover issue for $894.90. what? LOL!

Lincoln Child delivers another gripping tale, present day earth, but encompassing science, and some premises that are based in science fiction. Some potential interstellar travelers placed a "package" in the Earth's mantle, below the "Moho".

There are descriptions of tunneling through the crust to the Moho, an undersea complex down 2 miles, some of the physics supporting such a complex, and the biology of life at depth.

I found it interesting and mentally stimulating, and didn't put it down, til I finished it.
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