I found a website that purports that the remaining 4 books in the series are “coming soon.” But it doesn’t indicate a date, and I don’t know if they’re perpetually “coming soon” or if this is still a project being pursued. Anyone know about the status of these books?
The fact that the the latest release was in 2018 suggests to me that answer is probably no.
That being said, I don’t think there’s much significant difference between the original sequences and the published version aside from some copy editing. You can always find the blog posts the books are comprised of at https://www.lesswrong.com/tag/sequences
I believe there’s also an epub/mobi version of the whole sequences floating around somewhere which you can easily sideload onto your EReader of choice.
The previous edition of the entire sequences is available as epub/mobi/pdf.