A trilogy set in the Banished Lands 130 years after The Faithful and the Fallen, following a new generation amid conflict between the Ben-Elim, humanity, and demonic forces.

3 books · View reading order →

novel series · complete

Of Man and Manta

by Piers Anthony

Science-fiction trilogy concerning humanity, manta-like aliens, and machine intelligence.

3 books · View reading order →

series · complete

Off the Grid

by Alyssa Cole

A science-fiction romance trilogy set after the collapse of modern technological society.

3 books · View reading order →

anthology · completed

Omni Best Science Fiction

by Ellen Datlow

Three best-of science-fiction anthologies from Omni, edited by Ellen Datlow.

3 books · View reading order →

romance-series · complete

On the Verge

by Zoraida Córdova

A contemporary New Adult romance trilogy.

3 books · View reading order →

series · ongoing

Once Upon a Broken Heart

by Stephanie Garber

An ongoing young adult fantasy series about Evangeline Fox, the Prince of Hearts, curses, and the pursuit of happily ever after in the same universe as Caraval.

3 books · View reading order →

trilogy · complete

Once Upon a Con

by Ashley Poston

A young adult trilogy of geeky fairy-tale retellings.

3 books · View reading order →

comic-series · completed

Once Upon a Time at the End of the World

by Jason Aaron

A completed post-apocalyptic romance and adventure series.

3 books · View reading order →

novel series · complete

One of Us Is Lying

by Karen M. McManus

A connected young adult mystery-thriller trilogy set around Bayview High, following overlapping characters through successive secrets, games, and murders.

3 books · View reading order →

series · completed

Operation: Save the Teacher

by Meg Wolitzer

A three-book series about young students whose efforts to help their teacher lead to comic complications.

3 books · View reading order →

spin-off-series · ongoing

Origin

by Jennifer L. Armentrout

A Lux spin-off series following Luc and Evie.

3 books · View reading order →

subseries · complete

Original Shannara Trilogy

by Terry Brooks

The foundational Shannara trilogy following the Ohmsford family and the struggle against the Warlock Lord.

3 books · View reading order →

trilogy · complete

Orris and Timble

by Kate DiCamillo

A trilogy of illustrated early chapter books about an unlikely friendship between a rat and an owl.

3 books · View reading order →

series · complete

Orthogonal

by Greg Egan

A three-volume hard science fiction series set in a universe with physical laws different from those of our own.

3 books · View reading order →

series · ongoing

Out of the Dark

by David Weber

A science-fiction series about humanity's confrontation with the Shongairi and the powers that oppose them.

3 books · View reading order →

series · completed

Outlaws

by Elle Kennedy

A dystopian erotic-romance series about survivors living beyond the law after a devastating war.

3 books · View reading order →

nonfiction-series · complete

Outline of History series

by H. G. Wells

A three-volume sequence addressing human history, the science of life, and the conditions for mankind's future prosperity.

3 books · View reading order →

novel · completed

Outline Trilogy

by Rachel Cusk

A trilogy of novels following the writer Faye through encounters, conversations, and reflections on art, identity, relationships, and social life.

3 books · View reading order →

novel-series · completed

Owner trilogy

by Neal Asher

The trilogy following Alan Saul, the Owner, and the rebellion against Earth's totalitarian Committee.

3 books · View reading order →

scholarly-edition-series · complete

Oxford Marlowe

by Roma Gill

Oxford editions of Christopher Marlowe edited by Roma Gill.

3 books · View reading order →

novel series · completed

Pack of Misfits

by Raven Kennedy

A paranormal shifter-romance series following the unconventional members of Pack Aberrant.

3 books · View reading order →

subseries · complete

Paladins of Shannara

by Terry Brooks

A trilogy of separately published short e-books set around legendary Shannara warriors and history.

3 books · View reading order →

trilogy · completed

Paola Santiago

by Tehlor Kay Mejia

A completed middle-grade fantasy trilogy following science-minded Paola Santiago as she confronts monsters and spirits drawn from Mexican folklore.

3 books · View reading order →

nonfiction series · complete

Paper Hearts

by Beth Revis

Beth Revis's nonfiction series on writing, publishing, and marketing books.

3 books · View reading order →

trilogy · complete

Paranormalcy Trilogy

by Kiersten White

A paranormal young adult trilogy following Evie, an agent for the International Paranormal Containment Agency.

3 books · View reading order →

novel-series · complete

Parasitology

by Mira Grant

A science-fiction trilogy about engineered parasites, human identity, and the collapse of biological control systems.

3 books · View reading order →

novel-series · complete

Parasitology

by Seanan McGuire

A science-fiction medical thriller trilogy about genetically engineered tapeworms and the corporation that created them, written as Mira Grant.

3 books · View reading order →

character series · complete

Parker Pyne

by Agatha Christie

Cases involving professional happiness consultant Parker Pyne.

3 books · View reading order →

trilogy · complete

Pathfinder

by Orson Scott Card

A young-adult science-fiction trilogy involving time travel and alternate histories.

3 books · View reading order →

subseries · completed

Paths of Darkness

by R. A. Salvatore

A Drizzt sequence following the events of Legacy of the Drow.

3 books · View reading order →

novel-series · complete

Peacekeeper

by Tanya Huff

A continuation of the Torin Kerr and Confederation universe focused on peacekeeping after the major war.

3 books · View reading order →

novel-series · complete

Pegasus

by Anne McCaffrey

The Talent sequence focused on the development of human psi abilities and the Pegasus Project.

3 books · View reading order →

series · ongoing

Pelion Lake

by Mia Sheridan

A small-town contemporary romance series set in Pelion, Maine.

3 books · View reading order →

novel-series · complete

Penryn & the End of Days

by Susan Ee

An apocalyptic fantasy trilogy about Penryn Young and the angel Raffe after angels devastate the modern world.

3 books · View reading order →

children's series · complete

Perla

by Isabel Allende

A children's picture-book series about Perla, a powerful rescue dog whose loyalty, courage, and friendship help children face challenges.

3 books · View reading order →

trilogy · complete

Phèdre's Trilogy

by Jacqueline Carey

The original trilogy of the Kushiel's Legacy saga, following Phèdre nó Delaunay.

3 books · View reading order →

graphic-novel-series · ongoing

Phenomena

by Brian Michael Bendis

A creator-owned fantasy-adventure graphic-novel series created with André Lima Araújo.

3 books · View reading order →