Steinfield, H., Mooney, H.A., Schneider, F. And Neville, L. E. Livestock in a Changing Landscape: Drivers, Consequences, and Responses (Volume 1) and Gerber, P., Mooney, H. A., Dijkman, J., Tarawali, S. And De Haan, C. Experiences and Regional Perspectives (Volume 2)