My guess is that it's asking whether something is good or not, similar to saying いいですか.
So my question is what form is this and what does it stem from?
My guess is that it's asking whether something is good or not, similar to saying いいですか.
So my question is what form is this and what does it stem from?
As (the other) Will suggested in the comments, there are already several posts where you can learn more about the usage of かしら. As a short answer to your question:
Rather than いいですか, in most (if not all) situations it's better to think of it as a version of saying いいかも(しれない), e.g. after someone suggested something, it could be used as a response meaning like "a yeah, that might be good/work".