This is a list of all books in the Animorphs series by K. A. Applegate. For a list of authors who ghostwrote much of this series using Applegate's name, see Animorphs § Ghostwriters.

Animorphs main series

There are fifty-four books in the main series.^[1]

Companion books

Chronological list

This is a chronological list of the Animorphs books by K. A. Applegate, as applies to storyline continuity.

• The Andalite Chronicles (c. 1976, 1980s, 1997)
  • This book is divided into three parts: #1: Elfangor's Journey, #2: Alloran's Choice, and #3: An Alien Dies.
• 1: The Invasion (Spring 1997)
• 2: The Visitor
• 3: The Encounter
• 4: The Message
• 5: The Predator
• 6: The Capture
• 7: The Stranger
• Megamorphs 1: The Andalite's Gift (Summer 1997)
• 8: The Alien
• 9: The Secret
• 10: The Android
• 11: The Forgotten
• 12: The Reaction
• 13: The Change
• 14: The Unknown
• 15: The Escape
• 16: The Warning
• 17: The Underground
• 18: The Decision—(c. 1998)
• Megamorphs 2: In the Time of Dinosaurs—(Sario Rip time travel to 65,000,000 years ago.)
• 19: The Departure
• The Hork-Bajir Chronicles (1966, 1968–69, 1998)
  • Although the events in this story occur between The Ellimist Chronicles and The Andalite Chronicles, the entire story is being told by Jara Hamee to Tobias after book #13, The Change, and before the events of #23 The Pretender. Tobias makes reference to his restlessness and the fact that there were no missions planned (Prologue, pg ix). However, in The Pretender, (pg 12) Tobias makes reference to the fact that they had "worked plenty lately, dealing with the horrifying matter of David, the first new Animorph." This places the last possible "break" before book #20, the first book in the David trilogy
• 20: The Discovery
• 21: The Threat
• 22: The Solution
• 23: The Pretender
• 24: The Suspicion
• 25: The Extreme
• 26: The Attack
• 27: The Exposed
• 28: The Experiment
• 29: The Sickness
• Megamorphs 3: Elfangor's Secret (Time Matrix time travel to 10/25/1415, 12/25/1776, 10/21/1805, 1934, 6/6/1944, and 1967)
• 30: The Reunion—(sometime a little bit before or after 12/18/98)
• 31: The Conspiracy
• 32: The Separation—(c. 1999)
• 33: The Illusion
• 34: The Prophecy
• 35: The Proposal
• Visser (1976, 1980s, 1991–1999)
  • The trial chronicled in Visser is set during and after the events of The Proposal, but the book also covers events before The Andalite Chronicles.
• 36: The Mutation
• 37: The Weakness
• 38: The Arrival
• 39: The Hidden
• 40: The Other
• Megamorphs 4: Back to Before (1999, experimental timeline to 1997)
• 41: The Familiar
• 42: The Journey
• 43: The Test
• 44: The Unexpected (c. 2000)
• 45: The Revelation
• 46: The Deception
• 47: The Resistance
• 48: The Return
• 49: The Diversion
• 50: The Ultimate
• 51: The Absolute
• 52: The Sacrifice
• 53: The Answer
• The Ellimist Chronicles (story stretching billions of years into the past)
  • Technically this is set during the same time as the first chapters of The Beginning even though it covers events set far before The Andalite Chronicles.
• 54: The Beginning (2000-c. 2004)