The way to find detective books in the library is to look them up on the electronic reference machine. Collect the books you want to read on the library APP, see if they have been returned, and write down the number. Make sure you can borrow 3-5 books before you go to the library. Go directly to the library to operate the computer to check the borrowed books, give the list to the librarian, take out the books by yourself, and wait for the library card to go through the formalities while reading.