Man, I had forgotten how small of a font your pages have, Brandon. It took me a good 16 hours of reading to get through, but then again, anything of note I actually wrote down with page references. At least, up until the end, where I stop worrying about things like that. It's a beast of a logbook, coming out at like 4400 words. That probably took me a lot of time and I didn't even see the time flying by.

That, and maybe I'm just a slow reader.
Firstly:
Wow. ...I think that pretty much states it all.
Secondly: I have a few questions for you, whenever you get a chance to answer.
1.I really want to know what the last two metals are. I always thought the bead Elend ate was one of them, but perhaps they are just things of Preservation, not meant to be understood.
2. Do all three Metallic Arts still exist after the events of the book? Are Allomancy and Hemalurgy slightly degenerated now that Ruin and Preservation are dead, or does Allomancy still draw upon Preservation's power (just held with Sazed now)?
3. How were the Terris Prophecies created in the first place? Every other magic related thing is quite logically explained in terms of Ruin and Preservation, except that one.
4. When did Preservation decide to imprison Ruin in the Well? No need to be specific, I should think. A simple "Near Alendi's time" or "Way before Alendi's time" would suffice, or whichever time of reference you want to use.
Also, this one is not a question, but nice Hoid reference in there. I especially like it how the Ars Arcanum refers to Slowswift as "bears a striking resemblance to a well-known storyteller." I'm on to you...

All in all, phenomenal book. It wasn't what I expected, but that's an excellent thing, because you explained everything I wanted to know wonderfully (the epigraphs were a superb worldbuilding tool) and you did every character justice, even the Lord Ruler. My favorite character still must be Elend, followed by Breeze for moments of sheer hilarity. I just loved the book. My eyes hurt, but that is probably because I stayed up so late reading it. Great job!
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And now for you theorizers, since the other Spoiler topics were closed.
I have been beaten. My ideas were way out there. Yeah, pretty much all of my theories can be disregarded. Reaves wins the bet for the epigraphs, but I object on the grounds that he didn't pick any specific person.
My Hemalurgy theory was far too complex. Brandon's explanation makes far more sense. I wrote down in my logbook:
Epigraph 34 - It irks me that I did not think of Allomancy and Hemalurgy in terms of physics. Of course that's how they work. I'm a physics major, for crying out loud--I should have thought this in terms of Conservation of Energy. Still, nothing particularly enlightening about Feruchemy here. It's not the magics relation with the mists, it is their relationship with Ruin and Preservation. Of course it is.
We should've focused a lot more on the Ruin and Preservation thread.
Also, Ookla, we were right for saying that the mist spirit was, technically, part of Preservation! Blast you! You were just trying to tell us that it's not all of the power!
Speaking of that, Elmandr does
not win the bet for the mist spirit. At all. That one died just as quickly as my "Rashek writing the epigraphs" and things. Oh, and Hemalurgy--you could say it crashed and burned like my Hemalurgy theory, and with my "mists cause Allomancy" theory. Okay, now that that is settled...
Time for the part where I shamelessly mention where I was right, because I'm humble that way.
On the bottom of page 24 on the Countdown thread, I
totally called it out that the atium cache was the thing Ruin wanted. I had no idea why, but hey, it's the principle of the thing.
The earring. I was completely right that it was the thing that prevented the mist-burning, and in one of those later epigraphs, Sazed agreed with me. And, even more, it sort of had something to do with Hemalurgy. That counts. That counts big time.
Okay, and whoever made the topic that referenced the "on my arms" reference, I humbly do bow to you, because that was far more brilliant than any of my rants.
That also goes for everyone saying Ruin manipulated the 11th metal theory (Allomancy Hobo crashed and
burned) and manipulated things during the Final Empire. Kudos to you.
So, yeah. That's all I have to say about that for now. If anyone cares, I could post my log of my thoughts on MB3 as I was reading, but not now. Now is a time for sleep, desperately.