Starcraft: Dark Templar - Firstborn (Book 1)

Jake Ramsey - an unassuming, yet talented archaeologist -  has been given the chance of a lifetime. Hired to investigate a recently unearthed Xel'Naga temple, he knows this latest assignment will open up whole new possibilities for his career. Yet, when Jake discovers the remains of a long-dead protoss mystic, his hopes and dreams are irrevocably drowned in a flood of alien memories. Bonded to the spirit of the dead protoss, Jake has become the sole inheritor of the protoss's total history - every event, every thought - every feeling.

Struggling to maintain his own fragile identity amidst the raging psychic storm in his mind, Jake soon realizes that he has stumbled upon a secret so cataclysmic in magnitude -- that it will shake the very foundations of the universe.