.. Library card

Look around. There's one lying on the floor. ( Go to science fiction section. )

At the science fiction? Good. It just doesn't work yet. It doesn't have detective's picture in it.

Attach it to the library card.

Glue it there. ( You find glue from the hobby section table on third floor. )

Combine glue with the old library card. Combine the photo on the sticky library card. You have Paul's library card.