Yup, that was a hold over from waaaaay back. Originally Read Magic required a roll to succeed, but I decided it was so basic to a magic-user that
no roll should be required, just the expenditure of a magic point in the case of an unknown spell book or scroll.
So, in this case, think of the "if it succeeds" comment to mean "if the mage expends a magic point". That way I didn't "F" it up again.