In case you’re trying to buy the Language Construction Kit, bless you, it’s delayed.  Hopefully Amazon will fix the problem soon, if not forthwith, and it should be available in a week or so.

I changed the contents, making a number of corrections.  But for some reason Amazon messed up the cover, which I didn’t change— they shrank it about 15%; you can even see this on the Amazon page.   They’re trying to sort it out now.

Update: It’s available again.