Conservation Genetics - Book recommendations
This book "A primer of conservation genetics" would suit quite well I think. In particular chapter five deals with "Genetics and Extinction" and is preceded by a lot of population genetics based theory. A beginner might also combine it with "A primer of ecological genetics" (Hartl &amp; Conner) but you seem to have enough Pop gen knowledge to not need it!

The landscape genetics is perhaps a bit lacking from this book though. Maybe a better and more comprehensive solution, but slightly more advanced, is this book which does feature some aspects of landscape genetics in chapter 15 along with good population genetics type coverage of extinction.