Several other Adams books are still available from Steidl, including all of the ones shown in the 'Countless Miles' video above:
Steidl's first printing of "Summer Nights, Walking" is actually already sold out. I am glad that I didn't hesitate when first announced.
They do write "Comming Soon" so a second printing is planned, but with Steidl, one never knows.
It is my impression that his press is constantly booked with projects, and since this book is quad tone printed on very difficult paper (the uncoated but titanium oxide treated paper he talks about) it probably takes a lot of time at the press to get right.
BTW - I know for a fact that it is a challenging print because I had to return two samples due to too many small imperfections in photographs with areas that was supposed to be pitch-black - so I did have a conversation back and forth with the publisher.
If everybody else did like me, then the 3000 prints was suddenly only 1000 - and then I understand why it sold out so quickly.