From publisher blurb:
This book compiles the seven hexes that make up the Basilisk Hills cluster of the Populated Hexes series into a single book:
14.22 Lair of the Troglodytes
13.22 The Plateau of Sighs
14.23 The Basilisk Knights
15.22 The Toppled King
15.21 The River’s Source
14.21 The Gateway to the Pallid Fields
13.21 The Gangrenous Orcs
Together, they form an adventuring location that can keep your players busy for months of game time. In addition to multiple dungeons and lairs, the book contains:
A town suitable for use as a home base for the players during their explorations.
New spells and magic items.
New classes, including the half-dryad grove guardian, troglodytes, morlocks, orcs, and more.
New rules for expanding your OSR-style game, including magical research and ritual magic, running a clerical temple, ley lines and engines, ways to make dragons unique.