From publisher blurb:
The jungle planet Leviathan teems with mammoth lacerauns, savage beasts of enormous size and cunning, potential trophies unmatched in any other star system. Intentionally undeveloped beyond a few tourist-oriented settlements, Leviathan nonetheless draws more than just adventure-seeking hunters, including researchers and those who would see the world left completely untouched. Both are more than willing to turn the tables on any would-be hunters.
Leviathan is a setting book for The Last Parsec. It contains new locations and characters for the planetary system, new Setting Rules for Leviathan’s natural dangers, a Plot Point Campaign, Savage Tales, and a host of new creatures–especially the lacerauns.