When Morpheus Overslept — Michael Phillips

Brilliant physicist Henry Sullivan attempts to colonize TRAPPIST-1e in order to prove his superluminal theories, but is instead marooned and trapped by a terrifying alien in a ruined city and haunted by the ghost of his wife. When he discovers the true nature of her existence and its connection to his own latent telepathic powers, he realizes that this is the key to destroying the alien and saving a distant star system from an army of the inhuman Gorathkai.