Lin Carter, an engineer entangled in top-secret research at Lockheed, was in the midst of his morning routine when a sudden knock at his apartment door disrupted his day. Little did he know that this unexpected visitor would change everything. Enter a girl so enchanting she seemed to belong to another realm, igniting a love that would pull him through a labyrinth of doors—each leading to worlds within worlds. As Lins passion for her deepens, he realizes that the final door is already ajar, bringing with it the chilling presence of outer space on silent wings. To close this door—and save humanity—Lin must confront an agonizing choice forsake his love in a solemn pact with a woman from another world, who wields the power to either doom mankind or grant him a chance at salvation. - Summary by Back cover, Century Book first edition