1. Electron densities and chemical bonding: Old and new ideas 2. The intermolecular chemical bond: Physical facts and geometric fiction 3. X-ray analysis of crystals and the Cambridge structural database: Use and better uses 4. The organic crystal potential: History, development, and today's cost/performance ratios 5. Crystal structure prediction from molecular structure: Highlights and shadows 6. Crystal polymorphism: Conventional and real wisdom 7. Multi-molecular asymmetric units and cocrystals: Symmetry violation 8. Organic crystal nucleation and growth: Little knowledge, much mystery 9. The dynamic simulation of aggregate chemical systems: Use and misuse of long lists of numbers