1. Objects that move; 2. Bottlenecks, resources, and capacity; 3. The biggest myth of object tracking; 4. Which aspect(s) of tracking determine performance?; 5. Spatial interference; 6. Unitary cognition (System B); 7. Objects and attentional spread; 8. Grouping; 9. Two brains or one?; 10. Knowing where but not what; 11. Abilities and individual differences; 12. Towards the real world; 13. Progress and recommendations; Bibliography.