It really depends on which verb you choose as your reference point for the past simple. So, let's say that you choose the verb "find", then yes you could write all other actions prior to "find" in the past perfect: "I had ordered some books a long time ago in a library. However, as they had not arrived, I had decided to find them by myself and finally found them.
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Anonymousthanks for your answer but the past perfect changement was only for the last sentence :"I had ordered some books a long time ago in a library. However, as they did not arrive, I chose to find them by myself and finally found them. I had decided to do that because I had been tired of waiting".Is that possible as both actions happened before I found themThanks for