Singing the Dogstar Blues
Alison Goodman
 Joss gets partnered with an alien, Mavkel, who has somehow survived the usually fatal loss of his linked partner Kelmav. She gradually realises that she is expected to link with him, as she is the most open of all the students. They travel back in time to find out why and discover it was because the time-travelling Mavkel accidentally contaminated her as a pre-implantation embryo.