This is a well researched guide on Ogham, the written language of stones often seen near ancient Celtic settlements. This product blends historical findings with mythology to give us something very cool indeed. New ideas for Druids and Bards using Ogham are included along with a new feats, skill uses and revised spell lists. What is nice is the chart of the Ogham characters with sounds, English letter equivalents, and tree names. A lot of research went into all of this and the quality shows. Don't take it as a historical treatise on Ogham, but it is a great tool for a game. Nominally d20/3.5 but really the most of it can be used in any game.
[5 of 5 Stars!]