An album gathers songs or pictures from one period into a whole, so it is read as a chapter of life seen together. Dream books link it to looking back and taking stock.
Has this come up in your dreams before? What was going on in your life then?
My Cosmic Code has a private dream journal. Write a dream down and the app picks out the symbols in it, shows what dream books say about them and, over time, which words recur across your entries. The journal is stored on your device only.