Encyclopaedia of Herbal Antioxidants, gives information on antioxidant activity of different plant species. The book is divided into four sections. Section I gives an account of free radicals and their effect on human health. It also gives an account of different ways of free radical generation. Section II gives different antioxidant assays. It includes DPPH assay, Determination of Nitric oxide, Determination of hydroxyl radical scavenging activity, Determination of protein oxidation activity, Determination peroxyl radical scavengers, ORAC assay, TEAC assay, Lipid peroxidation assay, Determination of total flavonoid content etc. Section III is the main component of the book and gives the details of Herbal antioxidants. Investigations carried out on different plant species are listed alphabetically. The plant part used for the assay, the method of extraction, methods of assay, antioxidant activity and the flavonoids and phenolic composition of each and every species are given. A Table giving a list of plants in which antioxidant activity has been investigated is given. Name of the species, family, part used and the reference is listed. References on antioxidant activity are given at the end enhance the utility of the book. Authors, year of publication, Title, journal, volume and pages of references concerning herbal antioxidants is given. The book is useful for Doctors, Pharmacist, Botanists, Chemists and even layman.