The Morgos Incident: Elizabeth Thorne Book 1

Elizabeth Thorne is a Botanist, as well as an empath. She is assigned a mission with Captain Bianchi of the Starship Draco, and they are increasingly attracted to each other.
Someone has created a toxin that has destroyed the ecosystem of a planet - it is Elizabeth’s job to identify the toxin, and kill it while her Captain and his Crew battle the aliens who are trying to take over the Alliance.