Watching The Fall, and the detective searching a suspect's house instructs her team, "We're looking for clues about his identity, personality, lifestyle". And then the pigs use that to build their case.
My bookshelf is a mess now, from this point of view. It's got Xi Jinping on it. What should I get to normie things up? Obama's biography? A U2 poster?
The top 5 best sellers of each year. You can do this by genre too, fiction and non-fiction. The non-fiction will be extremely lib. Throw in specifically the top 3 political ones.
Done. Now your bookshelf is lib.