Among the most successful and influential series were Voices and Junior Voices, Connexions, and the Penguin English Project. Alongside these and other series, the imprint continued another Penguin tradition by producing Education Specials, titles which focussed on often controversial topics within education and beyond. They included highly topical books such as "The Hornsey Affair" and "Warwick University Ltd", reflecting the student unrest of the late 1960s and contributing to the intense national debate about the purpose of higher education. Other titles featured the radical and influential ideas about schooling propounded by writers and teachers from America and elsewhere.