Covered the basics pretty well, such as extinction, biodiversity, habitat destruction, fragmentation and overexploitation, but less so on the practical aspects of conservation, which I felt were quite unorganized in presentation and content. Perhaps owing to each chapter being written by different contributors, the book lacks coherence, some sections being more well written and thorough than others. The last chapter throws out several statistical theories and equations without much explanation, and comes across as more a treatise on statistical theory than anything else, not very useful IMO. What this book does well is giving a broad coverage of current research topics and the latest statistics on biodiversity and habitat destruction. More a collection of essays than a textbook in the traditional sense.