Some books on illegal trade
The Illegal Wildlife Trade by 
Policing International Trade in Endangered Species by 
Endangered Species, Threatened Convention by
Animal Welfare
Animal Law and Welfare - International Perspectives by 
Understanding Animal Welfare by At the 2016 World Conservation Congress and members’ assembly, IUCN's members adopted resolution (available via link below) which defined the use of nature for simultaneous benefits to biodiversity and human well-being: “actions to protect, sustainably manage, and restore natural or modified ecosystems, that address societal challenges effectively and adaptively, simultaneously providing human well-being and biodiversity benefits”
Biodiversity Conservation: a Very Short Introduction 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
Biodiversity Litigation by 
Global Justice and the Biodiversity Crisis: Conservation in a World of Inequality by 
Unraveling the Nagoya Protocol : a commentary on the Nagoya Protocol on access and benefit-sharing to the Convention on Biological Diversity by 
Biodiversity of Vegetable Crops, a Living Heritage by For more help on related topics, please follow these links