Eagles Over the Kennebec

I think you're right, though actually, the planets Coyster kept an eye on were in the mobile, as I recall. My main caveat is that this person looks MUCH older and ... developed ... than a fourteen-year-old. Oh, well, nothing's perfect. (Althought actually, the original cover of Agent of Change, with Val Con, Miri, and Edger, just about WAS perfect.)