I just finished putting together a hardcover book I'd been working on for a while, so that the process would be fresh in my mind for writing Part Four of the tutorial. It is the trickiest part of putting the book together, to tell you the truth.
I had a little trouble with it, and it didn't turn out quite as well as I had hoped. For one thing, my spine piece is a little too wide, so I'm going back and editing the previous post's measurements for the spine before anyone else makes the same mistake I did.
Also, I think from here on out, I'm going to stick to using cardstock for my end papers/fly pages, since it doesn't bubble on you as much.
Learn from my mistakes, friends. I hope I do.