There are a fair number of changes in the errata now, and printing costs (in CAD) are going up. As the book approaches its third year of publication, it seems like a good time to pull the plug on the dead-tree version. There are a number of copies in the distribution pipeline, so you will still be able to purchase paperback editions for a few more months from Chapters/Indigo (and likely a few other booksellers).
The ebook is still available and will continue to be available at all major vendors (plus directly through my storefront here), and the ease of updating an ebook means that all the changes are included in the version a customer downloads.
At the moment I don’t have any concrete plans to do a second edition, and my schedule is packed through to the winter so I won’t be able to get it done until 2018. That also means there aren’t any public lectures scheduled in the near future, either.