Completed by 1742, Book 2 was intended as a complement to Book 1, not as a replacement. It is generally far more difficult than Book 1 however, with greater technical and structural difficulty for the performer. It was the ultimate workbook, open to constant change and refining by Bach himself. In Jill Crossland’s own words, ‘No other music is so perfect an integration of emotional expression and intellectual rigour’. Jill first performed the complete Well-tempered Clavier from memory as a student in Manchester.