- Medicinal Plant Biotechnology: From Basic Research to Industrial Applications Vol. 1 (Wiley) 2007
- Medicinal Plants in Folk Tradition: An Ethnobotany of Britain & Ireland (Timber Press) 2004
- Medicinal Plants of Asia & the Pacific (Taylor-Francis) 2006
- Medicinal Plants of the World Volume 3 (Humana Press) 2005
- Mint: The Genus Mentha (Taylor-Francis) 2007
- Modern Phytomedicine: Turning Medicinal Plants Into Drugs (Wiley) 2007
- Narcissus and Daffodil: The Genus Narcissus (CRC Press) 2002
- PDR for Herbal Medicines 2nd Ed. (Medical Economics Company) 2000
- Plants That Fight Cancer (CRC Press) 2004
- Pocket Guide of Herbal Medicine (Thieme) 2004
- Prescriber & Clinical Repertory of Medicinal Herbs part 1
- Prescriber & Clinical Repertory of Medicinal Herbs part 2
- Solanaceae & Convolvulaceae: Secondary Metabolites (Springer) 2008
- Taiwanese Native Medicinal Plants: Phytopharmacology & Therapeutic Values (Taylor-Francis) 2006
- The Green Pharmacy (Sylvan Press) 1999
- The Handbook of Clinically Tested Herbal Remedies 2 Vol. Set (Routledge) 2004
- The Review of Natural Products 2004
- Thyme: The genus Thymus (Taylor-Francis) 2002
- Traditional Medicines for Modern Times: Antidiabetic Plants (CRC Press) 2006