All book series

The Engineer Trilogy

Tom Holt · 3 books · 2005–2007

The Journals of Anterg Trilogy

Wendy K. Ulmer · 3 books · 2017–2019

Bodenstein & Kirchhoff

Nele Neuhaus · 3 books · 2010–2018

Andy Brazil and Judy Hammer

Patricia Cornwell · 3 books · 1996–2001

The Empyrean Odyssey

Thomas M. Reid · 3 books · 2007–2009

Langdon St. Ives

James Blaylock · 3 books · 1984–1992

Darkside Park

Ivar Leon Menger · 3 books

Nsibidi Scripts

Nnedi Okorafor · 3 books · 2011–2022

Companions Codex

R. A. Salvatore · 3 books

The Gameshouse

Catherine Webb · 3 books · 2015

Nevernight Chronicle

Jay Kristoff · 3 books · 2016–2019

Age of the Five Trilogy

Trudi Canavan · 3 books · 2005–2006

Children of Time Series

Adrian Tchaikovsky · 3 books · 2015–2023

Battle Circle

Piers Anthony · 3 books · 1968–1975

Lightspeed Trilogy

Ken MacLeod · 3 books · 2021–2024

Blast

Emmanuel Larcenet · 3 books

Dragonlance: Dwarven Nations Trilogy

Dan Parkinson · 3 books · 1993

The Magic School Bus

Joanna Cole · 3 books · 1986–1996

The Once and Future King

T. H. White · 3 books · 1938–1940

Log Horizon

Mamare Touno · 3 books

Legends of Dune

Kevin J. Anderson · 3 books · 2002–2004

The Daevabad Trilogy

Shannon Ali Chakraborty · 3 books · 2017–2020

The Black Magician Trilogy

Trudi Canavan · 3 books · 2001–2003

Guardians of Ga'Hoole

Kathryn Lasky · 3 books · 2003

The New York Trilogy

Paul Auster · 3 books · 1985–1986

Homecoming

R. A. Salvatore · 3 books

Generations

R. A. Salvatore · 3 books

The Way of the Drow

R. A. Salvatore · 3 books

Shandril's Saga

Ed Greenwood · 3 books · 1987–2002

Cemeteries of Amalo

Sarah Monette · 3 books · 2021–2025

The Empyrean

Rebecca Yarros · 3 books · 2023–2025

Emily Wilde series

Heather Fawcett · 3 books · 2023–2025

Reconstruction trilogy

Thomas Dixon Jr. · 3 books · 1902–1907

Wages of Sin

David Weber · 3 books · 2003–2014

Silvers Series

Daniel Price · 3 books · 2014–2024

Housemaid series

Freida McFadden · 3 books · 2022–2024

The Situationship Series

Jessie H Reign · 3 books · 2023

The World of the Others

Anne Bishop · 3 books · 2018–2022

The Burning Kingdoms

Tasha Suri · 3 books · 2021–2024

Newsflesh

Seanan McGuire · 3 books · 2010–2012

The Ants trilogy

Bernard Werber · 3 books · 1991–1996

The Captive's War

James S. A. Corey · 3 books · 2024

Graystripe's Adventure

Erin Hunter · 3 books · 2007–2008

Tigerstar and Sasha

Erin Hunter · 3 books

Ravenpaw's Path

Erin Hunter · 3 books · 2009–2010

Molly Southbourne

Tade Thompson · 3 books · 2017–2022

The Wormwood Trilogy

Tade Thompson · 3 books · 2016–2019

Rats

James Herbert · 3 books · 1974–1979

Joe Kurtz

Dan Simmons · 3 books · 2001–2003

Crown of Feathers Trilogy

Nicki Pau Preto · 3 books · 2019–2021

Bill Bergson

Astrid Lindgren · 3 books · 1946–1953

Vurt series

Jeff Noon · 3 books · 1993–1996

Princess Academy

Shannon Hale · 3 books · 2005

Formic Wars

Orson Scott Card · 3 books · 2012–2014

The Indian Lake Trilogy

Stephen Graham Jones · 3 books · 2021–2024

Kylix

Lin Carter · 3 books · 1971–1984

Buck Rogers

Philip Francis Nowlan · 3 books · 1928–1981

The Book of the Ancestor

Mark Lawrence · 3 books · 2017–2019

Second Foundation Trilogy

David Brin · 3 books · 1997–1999

Aurelio Zen

Michael Dibdin · 3 books · 1988–1998