Both, topic depending. I can’t edit my original comment now but some things are weird. For example: I have 4 books about Gordon Ramsay. I have maybe 80 Chines

Both, topic depending. I can’t edit my original comment now but some things are weird. For example: I have 4 books about Gordon Ramsay. I have maybe 80 Chinese books. I have 60-70 c++ books. Maybe 40 books on game design. Many books about Apple and related dating back from the early 90’s. I have a set of weird books that are dated 1810. The English is old and hard to understand but one of them discusses Puritan religion and beliefs. So many topics...