What glue is usually used when making a pop-up book?
If it is for the tabs on the moving parts, use a cyanoacrylate available from craft shops, or (very blue peter this) double side sticky tape the thinest available is no thicker than ordinary sellotape, stick a bit to your tab cut to size peel off the waxed backing paper stick to site. For large areas on thin card PVA (white) glue can be used as a heat activated glue. Coat both surfaces that need to be fixed with a thin even layer of PVA glue, let it dry completely then position the two parts together, once positioned, press with a hot iron to fix the parts. For the spine, I would be inclined to stitch it, yes quite literally sew it together.
