All book series
2,590 series, best-documented first. Page 21 of 44.
The Angels cycle
Bernard Werber · 2 books · 1994–2000
The Chronicle of the Fallers
Peter F. Hamilton · 2 books · 2014–2016
The Age of Unreason
Gregory Keyes · 2 books · 1998–1999
Duluoz Legend
Jack Kerouac · 2 books · 1962–1965
The Sarantine Mosaic
Guy Gavriel Kay · 2 books · 1998–2000
Commonwealth Saga
Peter F. Hamilton · 2 books · 2004–2005
Monster tetralogy
Enki Bilal · 2 books
The Reindeer People
Robin Hobb · 2 books · 1988
The Time Runaways Series
Philippe Ebly · 2 books · 1977–1978
The Whodunit Detective Agency
Martin Widmark · 2 books · 2008
The Hand of Thrawn
Timothy Zahn · 2 books · 1997–1998
Capitalism and Schizophrenia
Gilles Deleuze · 2 books · 1972–1980
Knights of Sidonia
Tsutomu Nihei · 2 books
Vatta's Peace
Elizabeth Moon · 2 books · 2017–2018
Deverry Cycle
Katharine Kerr · 2 books · 1987–1993
Bum trilogy
Andy Griffiths · 2 books · 2001–2005
Crispin: The Cross of Lead
Avi · 2 books · 2006–2010
Dalemark Quartet
Diana Wynne Jones · 2 books · 1977–1993
Doctor series
Richard Gordon · 2 books · 1952–1973
Hawk Queen
David Gemmell · 2 books · 1995
Angélique
Anne Golon · 2 books · 1957–1959
Fortunes of War
Diane Carey · 2 books · 1986
Greatwinter
Sean McMullen · 2 books · 1999–2001
Logan's Run
George Clayton Johnson · 2 books · 1967–1977
Changeling
Roger Zelazny · 2 books · 1980–1981
Schooling Around!
Andy Griffiths · 2 books · 2008
Touchstone Trilogy
Steve Augarde · 2 books · 2003–2006
Flood/Ark
Stephen Baxter · 2 books · 2008–2009
The Magic Thief
Sarah Prineas · 2 books · 2008–2009
Legion of Space Series
Jack Williamson · 2 books · 1934–1950
Francis Sandow
Roger Zelazny · 2 books · 1969–1973
Maus
Art Spiegelman · 2 books
Judge Dredd
John Wagner · 2 books · 2011
The Dreamblood
N. K. Jemisin · 2 books · 2012
Scarabaeus
Sara Creasy · 2 books · 2010–2011
Second Sons
Jennifer Fallon · 2 books · 2002–2003
The Whitby Witches
Robin Jarvis · 2 books · 1991–1992
Khaavren Romances
Steven Brust · 2 books · 1991–2002
The Ables Series
Jeremy Scott · 2 books · 2015
The Demon's Lexicon
Sarah Rees Brennan · 2 books · 2009
Left Behind: The Kids
Tim LaHaye · 2 books · 1998–2005
Legends of the Raven
James Barclay · 2 books · 2003
Magic Shop Books
Bruce Coville · 2 books · 1991–2003
Magister Trilogy
Celia S. Friedman · 2 books · 2007–2009
New Tales of the Vampires dylogy
Anne Rice · 2 books · 1998–1999
Ilium/Olympos
Dan Simmons · 2 books · 2003–2005
Sorcerer to the Crown
Zen Cho · 2 books · 2016–2019
JoJo's Bizarre Adventure
Hirohiko Araki · 2 books · 2013–2021
The Prince of Tennis
Takeshi Konomi · 2 books
City Hunter
Tsukasa Hōjō · 2 books
The Flashman Papers
George MacDonald Fraser · 2 books · 1975–1977
Garfield
Jim Davis · 2 books · 1980–1988
Shaper/Mechanist universe
Bruce Sterling · 2 books · 1982–2016
Aurora Teagarden
Charlaine Harris · 2 books · 1990–1992
The Art Trilogy
Clive Barker · 2 books · 1990–1994
The Babysitter
R. L. Stine · 2 books · 1989–1991
The Book of the Long Sun
Gene Wolfe · 2 books · 1993–1994
The Mayflower Trilogy
Orson Scott Card · 2 books · 1994
The Shapeshifter
Ali Sparkes · 2 books · 2006–2007
The Troy Game
Sara Douglass · 2 books · 2002–2005