Mr Hill doesn't seem to mind me sending an email once or twice a year, he's never been anything but excited and nice to me.
That said here's the most recent email between us.
Hi Mr. Hill,
I was just thinking it'd be nice to get the new edition for Christmas
and thought I'd send an email to see if that was realistic. Any chance
of seeing this on shelves this year? Or is page layout, indexing and
galley proofing still in process? Or have I complete messed up how
long things take in publishing a book this size?
Tell me about it! Right now we're going through the
book fixing errors. We're still few weeks away from
starting on the indexing, after that comes the page
layout and then the galleys to inspect.
They're telling us it may be on the streets by spring.
This is the first time he's mentioned an actual publish date coming back from the publishers, so that's good news, but he's been very optimistic every time I've talked to him, so I'd expect closer to summer or maybe even the fall date Amazon.ca is guessing at, but we're down to only three items left on the check list: Indexing, Layout and Proofing. So I do think next fall is likely an upper limit on the work left.
That said the last six months have been spent almost exclusively on fixing errors, so I certainly can't be confident in any predictions.
Indexing is a large difficult project, but probably not the size of editing and fixing error in the entire volume, so my guess is probably around 3 months or so.
Layout isn't huge deal normally, but this is a huge project so I'd expect it to take as long as indexing. If the authors aren't doing this themselves then it can be done concurrently with indexing. This article says it takes about a month to layout a normal book.
http://www.stevenpressfield.com/2012/10/why-it-takes-so-long-to-publish-a-book/. So maybe another three months for this tome.
Galley Proofs are the final approval of pages and last minute typo catches, so I'd expect another month or so.
Finally they have to do the actual print run and plan a release. I really hope they just push this through and do it in like a month to get it out.
That puts it at around 5-9 months of additional work left.