Ann McCaffrey

Decision at Doona

Crisis on Doona (with Jody Lynn Nye)

Treay at Doona (with Jody Lynn Nye)

Dinosaur Planet

Dinosaur Planet Survivors

Get Off the Unicorn

Restoree

Coelura

Stitch in Snow*

The Year of the Lucy*

Three Women:Ring of Fear, The Mark of Merlin, The Kilternan Legacy*

The Girl Who Heard Dragons

The Lady (aka The Carradyne Touch)*

A Time When

The Ship Who Sang

The Ship Who Searched (with Mercedes Lackey)

The City Who Fought (with S.M. Stirling)

Partnership (with Margaret Ball)

Sassinak (with Elizabeth Moon)

The Death of Sleep (with Jody Lynn Nye)

Generation Warriors

To Ride Pegasus

Pegasus in flight

The Rowan

Damia

Damia's Children

Lyon's Pride

Acorna (with Margaret Ball)

Powers That Be (with Elizabeth Ann Scarborough)

Power Lines (with Elizabeth Anne Scarborough)

Power Play (with Elizaeth Ann Scarborough)

The Crystal Singer Books

Crystal Singer

Killashandra

Crystal Line

The Dragon Riders of Pern Books

Dragonflight

Dragonquest

The White Dragon

Moreta: The Dragonlady of Pern

Nerilka's Story

Dragonsdawn

Dragonsong

Dragonsinger

Dragondrums

The Renegades of Pern

All the Weyrs of Pern

The Chronicles of Pern: First Fall

The Dolphins of Pern

Dragonseye

The Masterharper of Pern

* not science fiction/fantasy

This does not in anyway include all of her books, but at least most of them.