A copy of 1971's bestseller book "The Exorcist", by William Peter Blatty, published by Harper and Row, this copy in dust jacket and **SIGNED** in black marker pen by the author. This may or may not be a first edition, but apparently it is not "first state" even if it is, as the last number on the last page is a "5". The book exhibits some sunning/stain on the spine itself (as opposed to the dust jacket), with a previous owner's name written in front, and the dust jacket has some wear, including a one inch tear on reverse side at top. Clearly not a mint copy but scarce and desirable as signed. Blatty (1928-2017) was an American writer and filmmaker. This story about a 12 year old girl possessed by demons topped the bestseller list for 17 weeks and was on the list for 57 weeks. The movie made after it, in 1973, was a pop culture phenomenon at the time, clearly recalled by today's Baby Boomer population. Thirteen million copies of the book were sold in the United States and many more overseas. Blatty died in 2017 of multiple myeloma.