Half of what I read as a kid came from the library (and by "the library" I mean any one of at least 7 systems) and went back a week later. Half the remainder ca

Half of what I read as a kid came from the library (and by "the library" I mean any one of at least 7 systems) and went back a week later. Half the remainder came from thrift stores and was left back in there in boxes when we moved. How common is it to have a personal physical copy of all your childhood possessions? What's the demographic variation?