The machine wasn't doing very much when I got there. They'd only just switched it on and apparently it won't work too well until it's warmed up--and they mean warm. The copy of Divide by Zero I bought from them was truly "hot off the press"!
See that printer thing sitting on top. Once they'd downloaded my book it started printing the cover. You can just see the colors of Divide by Zero and the writing on the spine in the picture to the right.
Meanwhile at the other end of the machine a super-fast printer was churning out page after page for the interior, outlined in yellow here.
The printed pages pile up in the middle, all nicely stacked together, while the cover slides neatly into place down below.
I tried to take a picture of the glue gun but it was too hard to see. The pages are clamped together and rotated, then fresh hot glue runs along the spine which promptly drops to the right place on the cover. Amazing stuff.
Finally the whole thing rotates again while a super-sharp cutter slices it down to size. At which point, look! There's my book!
Genuinely, warmly, gloriously hot off the press!