I Am Titanium — John Patrick Kennedy

Pax is a teen-age genius who learned to contact the astral plane and communicate with a being who lives there. He's also dying. So when Pax's astral mentor offers him a chance at life and power greater than any human has ever possessed, in exchange for helping the astrals inspect Earth, Pax jumps at the chance. What happens next sets off a series of events that change Pax and his friend Scarlett forever…  Partly because the astral beings have their own agendas, and for some of them, mankind's survival means very little. And they're not even the biggest threat…