Canopus (Canopus #1)

Helen wakes up marooned on a lifeless alien planet 300 light years from Earth with no memories beyond a hazy sense of extinction-level urgency to return to Earth. Joined by Arther, her strange robot companion, she explores the planet to find materials necessary to repair her ship. However, circumstances are not as straightforward as they seem. Along the way, Helen's most painful memories return as monstrous manifestations hell-bent on her destruction. Canopus is Castaway meets Annihilation, with a healthy dose of 'Phillip K. Dick' thrown in for good measure!