Back BooksTakealotLearning Scientific ConceptsA Unified Theory of Conceptual ChangeR 6 575.00Takealot ยท checked 18 days ago View at Takealot AverageR 7 323.00Lowest seenR 6 575.00Highest seenR 7 323.00Last change-R 748.00First indexed20 Oct 2026RetailerTakealotPrice history