I am currently pretty pissed off at Faded Page for insisting on publishing a book that is NOT out of copyright in Canada (Autumn Term by Antonia Forest, pseudonym of Patricia Rubinstein, who died in 2003 and bequeathed her copyrights to a friend), under the quite ridiculous pretense that an author publishing under a pseudonym is "unknown" and therefore their book is public domain in Canada fifty years after first publication. The author at that point was not even dead and the book was still being reprinted in the UK (I bought the 2000 Faber Children's Classics edition new, I am pretty sure). Her publishers and a lot of other people knew her identity, even if it wasn't public knowledge.