Just Out of Jupiter's Reach (The Far Reaches, #5)

by Nnedi Okorafor

But Kármán said this one meeting of seven days would be fine. After that, we were to be alone for the rest of the five years before returning to Earth, if we chose to. If any of us broke this rule and traveled together, we’d forfeit the remaining millions we would earn in that time. Always the threat of losing what we were owed. Typical capitalism.