From publisher blurb:
Enter the battle frenzy!
Join a campaign where barbarians, bards, druids, paladins, and rangers all belong. This is where the roots of fantasy gaming began, with swords that talk and glow, hidden elven lands, and warriors capable of astonishing feats of glory.
This campaign setting features six different Celtic cultures to play in, along with a timeline and notes on Celtic culture; four new NPCs; five castles with detailed descriptions and maps; six new planes of existence; 15 new subspecies; 17 new subclasses; 38 new spells; 50 new magic items; and 125 new deities grouped into six different pantheon.
Grab your spear, lime your hair, and prepare yourself for a battle that will shake your foes to the core. Celtic Adventures await!