Gravity. The Alex Cave Series Book 4.

When a supernatural force begins dragging the International Space Station from orbit, geophysicist Alex Cave is called in to investigate the situation, in this science fiction techno-thriller.

Alex receives an urgent message about an unusual geologic event in Iceland. Giant globules of molten rock are defying the laws of physics by floating up out of an ancient glacier. Soon satellites start falling from the sky, and Alex begins a desperate race to find the cause, and if possible, stop it.

Things go from bad to worse when the same force begins pulling the moon closer to Earth, and his attempts to find a solution are thwarted by a ruthless woman determined to make a profit from the dire circumstances.

Alex must also deal with his live-in girlfriend, Fala, who thinks he's just an adventure junkie, leaving her and her 10-year old daughter on a moment's notice without any explanation or concern for her feelings. Because of the clandestine nature of the operation, it's ripping his heart out that he can't tell her he is on a top-secret mission to save the lives of everyone on the planet.

And as if that wasn't bad enough, a massive emerald asteroid with a core of solid gold is on a collision course with Earth and will impact in six-days.