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
The Murder House Trilogy the "Nancy Drew/Hardy Boys SuperMystery" series, and the graphic novel series, which all say "Undercover Brothers" on their covers, but are not part actually part of the main series. "The Murder House Trilogy" is the first Hardy Boys mini-series since 1993 and only the third official one ever. (The other two are the "Operation Phoenix Trilogy" and the "Ring of Evil Trilogy", with Casefiles #8 "See No Evil", 16 "Line of Fire" and #55 "Beyond The Law" being the only unofficial trilogy.) Also noteworthy is that The Hardy Boys Super Mystery #3 "Haunted" was published on August 8, right in