The Other (1971) - Thomas Tyron

I saw the movie The Other (1972) for the first time when I was around 9 years old. They used to play it on regular TV a lot in the 70's and I watched it several times and really enjoyed the creepiness factor to it.

When I was young, I always thought that there were supernatural things occurring in the plot (Holland was a ghost, "the game" was some kind of extrasensory projection, etc.) however I recently re-watched this movie and determined that there were no supernatural elements, which actually made the story quite more terrifying. I decided to read the book (which had been on my bucketlist for years anyway) to see if there were any additional clues, and although it's open to interpretation, I still think there is nothing supernatural going on.

The book is actually very good, set in the mid-1930s, and is about an extended family living on a remote farm in Connecticut, where tragic events begin occurring. I won't say more since it would add spoilers, but if you like somewhat slow-burning psychological thrillers, I highly recommend it.