the greatest thing about books about pinhole for me, is not the DIY, but the variety of creative pinhole cameras made. I just saw this one here:
The “Create your own pinhole camera” is not just a book, but a camera kit also. Besides, the book comes with great pictures for inspiration.
“The pinhole cameras: a DIY guide” doesn’t come with the kit, but traches you how to do yours. It comes with curious cameras ;)
This is just about paper cameras, and it comes with a cd with templates.