"The field of conservation genetics has changed dramatically since the 2nd edition of this book was published in 2013. One-third of the references in this edition were written after the publication of the 2nd edition. We have changed the title to reflect the growing and profound influence that genomics has had on applying genetics to problems in conservation. We have witnessed an extraordinary explosion of knowledge of the genetics and genomics of natural populations because genomic approaches have become more affordable and accessible. It has been a real challenge to add the new literature while keeping the book to a reasonable size. To accomplish this, we have put the Appendix and the References online. We understand that this is inconvenient, but we wanted to avoid an unwieldy book. Approximately 10% of the 2nd edition was taken up by the References. The References and Appendix can be downloaded from the following companion website: www.oup.com/companion/AllendorfCGP3e"--.