Indeed, I feel I can only point generically to the other volumes in the library if I don't know what prospective learners are interested in. Likely, these learners have no idea how to formulate their learning need. So, it's a bit of chicken and egg situation. If you are able to formulate a phrase starting with "I would like to know more about ... " I may be able to help you with a relevant, systems-oriented reading suggestion. Thanks for reading and leaving a note.