The ninth the Dray Prescot series.

A fantasy series written by David Drake.

The Lord of the Rings, the great epic trilogy by J.R.R. Tolkien about Middle-Earth and the ending of an age.

A series of science fiction novels by Joshua James.

A series of novellas written in eBook form to compliment the Fate of the Force series.  Written by John Jackson Miller.

A series of science fiction books by Joshua James.

A science fiction series by Ian McDonald.

A series of childrens' books by Summer Short.

A trilogy of short fantasy novels by Larry Niven.

An ongoing series by Piers Anthony that takes place in a mystical realm that, geographically, looks a lot like Florida.

A series of books written by Lev Grossman.

A series of science-fiction / fantasy by Arthur Landis

A series of books by Hugh Walker.

A mega-series of all Malazan related stories.

A series of fantasy novels and novellas written by Steven Erikson

A Malazan series by Ian Cameron Esslemont.

A series of fantasy novels by David Eddings set in the same world as the Belgariad.

A series of horror novels by Graham Masterton.

A series by Larry Niven and others that takes place in Niven's Known Space universe.

A sience fiction series written by Kim Stanley Robinson.

A series of fictional books for kids written by P L Travers.

A series of science fiction novels that a related to the Mass Effect: Andromeda video game by various authors.

A series of spy / espionage novels by Donald Hamilton.

A series of books by James Dashner about a dystopian future aimed toward teens and young adults.

A series about Merlins life.

A series by Rene Guttereidge

A series of fiction novels written by Michael Connelly featuring Mickey Haller - The Lincoln Lawyer.  These take place in the world of Harry Bosch.

A series of mystery and intrigue novels written in Swedish.

A series of YA books written by Ransom Riggs.

Fantasy series written by Brandon Sanderson.

A series by Orson Scott Card geared toward a younger audience.

A series of science fiction novels by Piers Anthony dealing with miltiple / alternate realities.

A series of fantasy books written by Stephen R Donaldson.

A series of science fantasy novels written by CJ Cherryh.

A series of supernatural fantasy books written by Cassandra Clare.

A science fiction series of novellas and novels by Martha Wells about a non-human security unit.

The third trilogy of Kushiel's Legacy.

A series of short fiction by Dean R Koontz that is also broken down into subseries called seasons.

A series of middle grade novels written to appeal to young girls starring Nancy Drew who solves mysteries.  They were written by several people using the pen name Carolyn Keene.  The first thirty-four books in the series were later revised to be more up-to-date and to remove some unfavorable stereotypes beginning in  1959 until 1977.

This series includes the original 64 books starting with The Secret of the Old Clock and ending with Captive Witness (1981) and only includes the revisions of the first 34 books.  The copyright dates for these are the revised dates since I consider the originals to be different "books" even though they have the same title.  I have not decided whether not to document the titles for the original series as of now.

For the books in this series I've added the "true" author to the list (even if this is questionable) along with the psuedonym Carolyn Keene that is credited on each book.

This is a series of graphic novels reprinting the English translations of Neon Genesis Evangelion manga.

Sister of Darkness.  Takes up from the Sword of Truth series and then the Richard and Kaylen series.  Written by Terry Goodkind.

A science fiction duology by Robert Silverberg and Randall Garrett.  Also known as Nidor.

A series of science fiction novels by Peter F Hamilton.  Originally three novels but was broken down into six when released to paperback.  A part of the Confederation series that consists this series as some short stories.

Nikki Heat is a series of books written by Richard Castle as seen on the Castle television series.  At least some of them (if not all) are written by the author Tom Straw.

This is a series of graphic novels reprinting the English translations of Tenchi manga.