just something i noticed quite often in alaHazrat's books is his memory in relation to his written works. i often find that in writing one book, he refers to discussions in his other books. e.g. in al-amnu wa'l 'ula, he refers to salTanati'l muSTafa --- i believe this shows that his books aren't repetitive. he will repeat his viewpoint with proofs but will not go into all the details all the time. he seems to remember which discussions are in which books eventhough he is known to have written near enough a thousand works.