Ascension

A huge mountain suddenly appears in the middle of the Pacific Ocean and a group of scientists and some people with guns are sent to investigate. In the end everything is explained in a name and the name is..(huge drumroll).... Neil Amai. Nobody could quite believe it when they worked it out, and my eyes, they rolled like mad things, just like they did with the Sutekh reveal in Dr Who.

Anyway, told in series of rambling letters, this is an insane mix of adventure, science and theology. The start of the book, especially the foreword, is beyond good, it really draws you in. The more the story unfolds, and unfolds is the correct term, the madder it becomes, and yet it is incredibly readable, even the science bits. On the whole, most of it works, some of it doesn't, some of it is incredibly corny and so much is left unanswered, but I really enjoyed it anyway. (even the science bits)

If you liked any of these you will probably enjoy it

The Sphere by Michael Crichton
The Mountains of Madness by Lovecraft
Dr Who & The Seeds of Doom
Abominable by Dan Simmons