First King of Shannara, by Terry Brooks –
Shannara, prequel
Published: 1996
Prequel
Diablo
Diablo, by Max Hawthorne – Kronos Rising: prequel Published: 2005
Becoming Quinn
Becoming Quinn, by Brett Battles – Jonathan Quinn, prequel Published: 2011
The Bishop’s Pawn
The Bishop’s Pawn, by Steve Berry – Cotton Malone, prequel Published: 2018
The Kill Order
The Kill Order, by James Dashner – The Maze Runner, prequel Published: 2012
Island 731
Island 731, by Jeremy Robinson – Nemesis saga, prequel Published: 2013
Ten Weeks That Changed England Forever
Ten Weeks That Changed England Forever, by Cassandra Clark – Abbess of Meaux, prequel Published: 2016
Forsworn
Forsworn, by Brian McClellan – Powder Mage, prequel Published: 2014
Sword of Destiny
Sword of Destiny, by Andrzej Sapkowski – The Witcher, prequel 1 Published: 1993
The Kimberley Secret
The Kimberley Secret, by Gabriel Farago – Jack Rogan, a late prequel Published: 2018
The Hunter
The Hunter, by Chris Carter – Robert Hunter, prequel Published: 2013
Rock Point
Rock Point, by Carla Neggers Sharpe & Donovan, prequel Published: 2013
Angels in the Moonlight
Angels in the Moonlight, by Caimh McDonnell Dublin Trilogy, prequel Published: 2017
Origins
Origins, by Steve Alten MEG, prequel Published: 2011
Prime
Prime, by Jeremy Robinson Co-author Sean Ellis Jack Sigler, prequel Published: 2012
One Foggy Night
One Foggy Night, by Jake Bible Dead Mech – Apex, prequel Published: 2013
The Papua Incident
The Papua Incident, by Urcelia Teixeira Alex Hunt, prequel Published: 2018
The Lost Canvas
The Lost Canvas, by Ernest Dempsey Sean Wyatt, prequel Published: 2012
Fall of a Lost Sun
Fall of a Lost Sun, by Riley Morrison Caverns of Stelemia, prequel Published: 2018