Public Domain Day

It's Public Domain Day, the day when hundreds of authors' works enter the public domain. Here's a complete list. Some highlights:

-William Butler Yeats, who won the Nobel Prize in literature in 1923
-Sigmund Freud, famed psychologist
-Zane Grey, a prolific Old West novelist
-Luis Philip Senarens, one of the most prolific dime novelists of his day
-Henry Salt, credited as the first writer who argued that animals should have rights
-Zona Gale, Pulitzer Prize-winning playwright
-Siney Howard, a playwright and screen writer who won a posthumous Academy Award for the screenplay of Gone With the Wind