Trilogy and "The Apu Trilogy" of films by Satyajit Ray. Others are connected only by theme: for example, each film of Krzysztof Kieślowski's "Three Colors" trilogy explores one of the political ideals of the French Republic (liberty, equality, fraternity). Trilogies can also be connected in less obvious ways, such as "The Nova Trilogy" of novels by William S. Burroughs, each written using cut-up technique. The term is less often applied to music, such as the "Berlin Trilogy" of David Bowie which is linked together by musical sound and lyrical themes, all having been recorded at least partly in Berlin, Germany. The
1970s in music major sensation in 1977 and were the first serious challenge to the established rock groups like the Rolling Stones and Led Zeppelin, although the punk era in Britain lasted only three years and effectively ended with the Pistols' breakup. The mid-to-late 1970s Australian band AC/DC became one of the most popular and successful acts in Australia, scoring a string of hits, albums and singles. They made their international debut in 1976 with High Voltage. The band quickly became successful outside their home country; the "Highway to Hell" album from 1979 peaked at number 13 on the Kent Music Report Albums