Rosenqvist’s book (2nd edition, 1983, McGraw-Hill; later reprints by Tapir Academic Press) is known for its . It lacks the fluff of modern textbooks. Each chapter ends with worked problems—e.g., "Calculate the minimum carbon required to reduce FeO from a slag at 1600°C given activity coefficients." Practicing engineers keep it on their desks because it bridges theory and plant reality.