Suicide Run by Thomas Hottle
Retired Navy pilot Cui Yun, "Suicide," is living a quiet life on Amargosa when someone drops a baby on her doorstep. She is no ordinary baby. Her father is Amargosa's governor. When he survives an assassination attempt, his wife goes missing. Suicide and her protégé, JT Austin, are tasked with finding her. They will travel to the Neanderthal planet of Gohem, to the bizarre desert planet Marilyn, to post-apocalyptic Walton, and end up at Thule, the mysterious world above the galactic plain. There, they will not only save the baby's mother, they will confront those who want to control immortality itself.