I read this book back in middle-school, so probably it's juvenile fiction. I vaguely recall that the cover was blue, maybe with a woman looking up towards the stars.
Three explorers crash onto a planet. There is a woman, her father and what seems to be her intended? While they are trying to fix their ship the woman meets a man whose people have been enslaved. She helps him to unlock his brain's ability to use telekinesis, which he believes to be magic. He then uses this to defeat the "dragon," which is really just some sort of machine.