Songs in the public domain

Former Copyright Office librarian Tom Nichols has written They Never Renewed: Songs You Never Dreamed Were in the Public Domain. Published by The BZ/Rights Stuff, Inc., the book contains:
An Introduction that discusses Public Domain and how to safely use the information provided in the book; the heart of the book, which is a listing of 96 songs in the Public Domain written in the 50s and 60s and each listing includes the names of the composers, the original artist, the covering artists, the registration and renewal status and an audio link that will let you hear the song. Finally, there is a list of all the composers with their birth and death dates, and a listing of the performers and which songs they sang. Most countries use death dates, plus so many years, to calculate whether works are in the Public Domain or not, so the death dates will be useful to many readers.