Volume 4 of the 5-volume Quantum Nanochemistry covers quantum (physical) chemical theory of solids and orderability and addresses the electronic order problems in the solid state viewed as a huge molecule in special quantum states, including also the bondonic treatment of the graphene nano-ribbons, along basic crystallographic principles, from geometrical-, to chemical- to physical- (x-ray) crystallography with featured examples, and energetic correlating symmetry discussion on orderability in nanochemical compounds.