Quoting Greg Newby <gbnewby@pglaf.org>:
Or maybe an impostor. That happens, sometimes. Since it was ostensibly printed in 2009, what if the publisher never actually had permission from the copyright holder?
I've seen a few scans of books uploaded on the Internet Archive that are very obviously not pre-1923, but have the copyright dates (and only those) changed by somebody creative in Photoshop to some much earlier date (e.g. 1916), to pretend they are public domain. Happens a lot with scans of Indian origin for some reason. Just going to the preface confirms this fraud. Sometimes, metadata on archive.org is wrong as wel, listing 1923 for a 1932 book. For those reasons, I always verify the publication years against library catalogues, and double check with bibliographies to see if no illicit material slips through. Jeroen.