The tale is strange. Explorers are the ugly people of a humankind within the League of People, galactic civilization which frowns upon almost all kind of violence I space and against othe sentient races. The culprits are assimilated to non sentiments and the race or the organisation which is deemed responsible are severely punished and grounded from space.
This League of People is barely explored as a concept. Suffice to say that explorers are the marginalized people of humankind, because they have some birth defect.festina Ramos has an ugly cheek birthmark, and can only become an Explorer. She is sent to planet Melaquin, which apparently kills every Explorer after a short while.
Festina discovers the crest of this incredible planet, apparently so very similar to Earth, and tries to find a way off the planet. She discovers another sentient race, evolved from humans, the only inhabitants of Melaquin.
Festina is a very strong character with an ugly birthmark and a very staunch opinion of what an Explorer is, the last real men of mankind, in a too civilized universe. Strong character, not only a cardboard personality. Very good background and credible.
But I do not know if I shall read the other books, this book seem quite final. I know there are other books in the series, but right now I do not know if there is anything which can continue the story here. Which is quite good.