Complex sentence: In November 1955, William Howard Baker took over as editor of the Sexton Blake Library and in 1956, introduced a successful update of the Blake formula, finding new popularity with faster-moving stories (often influenced by American pulp fiction).
Split into simpler sentences: In November 1955, William Howard Baker took over as editor of the Sexton Blake Library and, in 1956, introduced a successful update of the Blake formula. The Sexton Blake Library found new popularity with faster-moving, more contemporary stories (often influenced by American pulp fiction).