The cross structure binding was invented by Carmencho Arregui, a Spanish bookmaker living and working in Italy. I learned it rom Alisa Golden's "Making Handmade Books." But the other day I found Arregui's website and learned that he has come up with several variations on this binding. I want to try them all.
I wanted this to be quick & dirty, so I didn't line the inside of the box. I just cut it to the cross-structure pattern, stitched the signatures over the tabs and glued the tabs down inside. This is not a hard book at all once you get the idea clear in your head.
It's late, so... g'night.