I bought a used book after a really long time, and found in it the original receipt for when it was bought.

In this case, the receipt was from 12 years ago, from a store that I used to frequent a lot at the time.
I bought a used book after a really long time, and found in it the original receipt for when it was bought.
In this case, the receipt was from 12 years ago, from a store that I used to frequent a lot at the time.