Enough time has passed that Agatha Christie’s books have started falling into the public domain in the United States. She published a new book (sometimes more)

Enough time has passed that Agatha Christie’s books have started falling into the public domain in the United States. She published a new book (sometimes more) every single year from 1921 until her death, so every January we can look forward to another expired copyright. I’ve read all of the Standard Ebooks editions (https://standardebooks.org/ebooks/agatha-christie https://standardebooks.org/ebooks/agatha-christie) and can recommend them. She died in 1976, so in life+50 countries, all her works will become public domain in 2027 (84 will still be copyrighted in the US); in life+70 countries, the year will be 2047 (34 will still be copyrighted in the US). The copyrights will continue to expire in the US until 2072, when the the last book published in her lifetime falls into the public domain.