An outhouse is the plainest place of release. Dream books read it as the need to let go of what is no longer useful, and as a reminder of basic, unpolished needs.
Does the traditional reading fit your dream, or did it mean something else to you?
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.