Learning you were adopted is read as questioning where you belong and where you come from. Dream books see it as a search for your own roots and a wish to define yourself.
Where in your waking life have you met something like this lately?
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.