Bright and Dangerous Objects by Anneliese Mackintosh
Softcover edition is a NEW Release - Commercial deep-sea diver Solvig has a secret. She wants to be one of the first human beings to colonize Mars, and she's one of a hundred people shortlisted by the Mars Project to do just that. But to fulfil her ambition, she'll have to leave behind everything she's ever known-for the rest of her life. As the prospect of heading to space becomes more real, thirty-seven-year-old Solvig is forced to define who she really is.