Wow! Maybe the deer part was an end cap telling you the dream was a teachable moment. You're looking back on your childhood with a sense of chaos, disorder, and vengefulness (yearbook)... in response to your sister's recent betrayal of you? Unreturned library books... a feeling that all this is in some small part because of your own negligence? I don't know your whole family history other than what you've posted here, but you are the one who could puzzle it out best based on your emotional attachment to the different elements.