Friedrich Wieck book he published some studies and exercises for the piano, a number of pamphlets, and edited various piano works. A turning point came in Wieck's life when Clara and Robert Schumann fell in love. Fearing that her marriage to an impecunious composer would destroy the plans he had for her music career, he opposed their union in every way he could. He threatened to shoot Robert. The young lovers resorted to clandestine meetings and letter-writing. Because Clara was not yet of age, her father's consent was required before they could marry. Not receiving his consent, they applied to the Saxon
Friedrich Wieck to spreading vicious rumours against the couple. He sent copies of his court documents to every city where Clara was planning to give concerts. When she traveled to Hamburg and Berlin to perform, he sent letters claiming that Clara's playing had declined. Striking an emotional blow against Clara, he began to promote the career of a rival female pianist, Camilla Pleyel. In July 1840, the court ruled against Wieck, and it gave consent to the marriage. Schumann then sued Wieck for slander and won. Wieck was forced to pay the couple a large sum, and he was sentenced to jail