Secret Matter by Toby Johnson
When aliens arrived from space, Kevin Anderson had no idea the Visitors' real reason for coming to Earth would ever affect him. He was, after all, just a young architect fresh out of college working on the reconstruction of San Francisco after the Great 1996 Earthquake. But one bright summer afternoon at Land's End beach, Kevin met a Visitor. And his life was never the same again.
As Kevin uncovered layer after layer of the secrets of the Visitor' lives, the secret about his own life he'd been hiding even from himself became more obvious and more compelling. And he began to realize that his telling the truth about himself might help the Earth discover the truth about the Visitors- before it was too late.