- The Geography of Black Pepper (Piper nigrum): The "King" of Spices – Volume 1
- The Agronomy and Economy of Turmeric and Ginger: The Invaluable Medicinal Spice Crops (Elsevier Insights)
- The Agronomy and Economy of Important Tree Crops of the Developing World
- Combating Global Warming: The Role of Crop Wild Relatives for Food Security
- Tree Crops: Harvesting Cash from the World's Important Cash Crops
























