Not me though. I have never actually seen a ghost. Well maybe years back in Dover in Kent. It was an old hospital that used to be a Workhouse. I was sent for an Xray, I could not enter the area as it was like a sheet of ice blocking me. Then I saw an unclear vision of some people. This was my only experience. I was told later, that the Xray department was the Morgue for the old Workhouse.
It was a few years back. They sent me to another hospital. I will see if I can find a pic of the old Workhouse.
Dream visits by recently dead people are perty common . The idea is that during deep sleep we all go out of body and we are meeting up with the person on the astral plane.
I don't know if you mean haunted houses , ghosts in general ,or dream visits , but there lots of books , posts on this forum , on the astral pulse , and spiritual forum , and tons of YouTube videos .
Before Amazon , and the web , there were lots of new age book stores . You could find books on ghosts , life after death , reincarnation ,ect , and lots of other things . Sadly most are gone now.
We had loads growing up,, my parents were avid readers,, I can't say we have a dedicated book shop, new or second hand round here. Our library sucks.