Pharmoko/poeia 1995 288pp Mercury House trade paperback. Illustrated. VG.
Pharmakodynamis 2005 294pp Mercury House trade paperback. Illustrated. VG.
Pharmakognosis 2005 383pp Mercury House trade paperback. Illustrated. VG.
 
An essential trilogy of works from the late poet, ethnobotanist, and novelist . Volume 1 deals with plant powers, poisons, and herbcraft. Volume 2 discusses stimulating plants, potions & herbcraft and volume 3 covers plant teachers and the poison path.