UNODC's first World Wildlife Crime Report "takes stock of the present wildlife crime situation with a focus on illicit trafficking of specific protected species of wild fauna and flora, and provides a broad assessment of the nature and extent of the problem at the global level. It includes a quantitative market assessment and a series of in-depth illicit trade case studies."
Animal Law and Welfare - International Perspectives by 
Understanding Animal Welfare by 
Whaling and International Law by Some books on illegal trade
Policing International Trade in Endangered Species by 
Endangered Species, Threatened Convention by Some subject searches to try in SOLO:
Biodiversity conservation
Wildlife conservation -- Law and legislation
Nature conservation -- Law and legislation
Conservation of natural resources -- Law and legislation
Renewable natural resources -- Law and legislation
Endangered species -- Law and legislation
Forest management -- Law and legislation
Forestry law and legislation
Wild animal trade -- Corrupt practices
Wild animal trade -- Law and legislation
Wildlife smuggling
Game protection
Poaching
Poaching -- Prevention
Wildlife crimes
International Liability Regime for Biodiversity Damage the Nagoya-Kuala Lumpur supplementary protocol by 
Unraveling the Nagoya Protocol : a commentary on the Nagoya Protocol on access and benefit-sharing to the Convention on Biological Diversity by 