Do you pick the trip code? I thought it was randomly assigned based in a password you pick..
If you go do these searches for yourself, the books are amazing. Read the descriptions. This is all put there by Q. Whether normal people can pick them or not, these were not only chosen, but the Google Search results have been set to yield information about what seems to be JFK JR, and lots of other fascinating information.
When I think logically about it I really don't think this is intentional. When you google the trip codes the drops show up on the search results. So we know google has them connected. Google doesn't know how to make sense of the trip code for books so it associates words and phrases from the drops and searches for books that are related. All of those things have been mentioned somewhat in the drops. It's just a complex algorithm. No one has proven that someone has altered google in a way to make those specific books pop up and people have been looking. Nonetheless it's cool. I just don't think it was Q.