The Fourth Consort

Dalton Greaves is a hero. He's one of humankind's first representatives to Unity, a pan-species confederation working to bring all sentient life into a single benevolent brotherhood. That's what they told him, anyway. The only actual members of Unity that he's ever met are Boreau, a giant snail who seems more interested in plunder than spreading love and harmony, and Boreau's human sidekick Neera, who Dalton strongly suspects roped him into this gig so that she wouldn't become the next one of Boreau's crew to get eaten by locals while prospecting. Funny thing, though--turns out there actually is a benevolent confederation out there, working for the good of all life. They call themselves the Assembly, and they really don't like Unity. More to the point, they really, really don't like Unity's new human minions"