Babel Tower is the third novel in Byatt's highly acclaimed Frederica quartet. Frederica is embroiled in two law cases, twin strands of the Establishment's web, a painful divorce and custody suit and the prosecution of an 'obscene' book. Frederica's personal and legal crises mirror an age; alongside Frederica's intellectual life teaching at art school in London are the diverging cultural worlds of the Beatles and the advent of computer languages.