Peter Cawdron is very much a hidden gem of current sci-fi. He specialises in asking “what if” when it comes to people meeting aliens for the first time, and creates such believable characters that anything apparently made-up or fictional about the situation in which they appear is just overlooked as you find yourself wrapped up in the story. · What if aliens landed in the Middle Ages? · What if a few isolated aliens were orbit in a small spaceship – could they wipe out humanity? · What if aliens spread like weeds? A lot of his books are listed here.