W20,000 Streets Under the Sky
W2023: A Trilogy
WBatman & Dracula trilogy
WThe Bounty Trilogy
WThe Copenhagen Trilogy
WDivergent (book series)
WThe Dreamseller
WFifty Shades (novel series)
WThe Junction Chronicles
WKristin Lavransdatter
WThe Lunar Trilogy
WThe Murder House Trilogy
WThe New York Trilogy
WOrdinalia
WOresteia
WThe Oversoul Seven Trilogy
WPan trilogy
WThe Rosie Result
WThe Salterton Trilogy
WSilicon Dreams
WStarchild Trilogy
WSword of Honour
WTales of the Kingdom Trilogy
WThe Tiny Book of Tiny Stories
WThe Transylvanian Trilogy
WU.S.A. (trilogy)
WThe Wimbledon Trilogy