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A collection of Animorphs books including selected companion books.

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.

List of main books and companion books in publication order

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

Number	Title	Publication date	Ghostwriter	Cover morph	Time period	Narrator	ISBN
01	The Invasion	June 1996		Anole lizard	c. Spring 1997	Jake	0-590-62977-8
02	The Visitor	June 1996		Cat (Fluffer McKitty)		Rachel	0-590-62978-6
03	The Encounter	August 1996		Red-tailed hawk		Tobias	0-590-62979-4
04	The Message	October 1996		Bottlenose dolphin (Monica)		Cassie	0-590-62980-8
05	The Predator	December 1996		Gorilla (Big Jim)		Marco	0-590-62981-6
06	The Capture	February 1997		Housefly		Jake	0-590-62982-4
07	The Stranger	April 1997		Grizzly bear		Rachel	0-590-99726-2
Megamorphs 1	The Andalite's Gift	May 1997		Siberian tiger, housefly, wolf, grizzly bear, and re-tailed hawk	c. Summer 1997	All six Animorphs	0-590-21304-0
08	The Alien	July 1997		Human (blends DNA of Cassie, Jake, Marco, and Rachel)	During or after December 1998	Aximili-Esgarrouth-Isthill	0-590-99728-9
09	The Secret	August 1997		Wolf		Cassie	0-590-99729-7
10	The Android	August 1997		Wolf spider		Marco	0-590-99730-0
11	The Forgotten	September 1997		Jaguar		Jake	0-590-99732-7
12	The Reaction	October 1997		Crocodile		Rachel	0-590-99734-3
13	The Change	November 1997		Human (past self)		Tobias	0-590-49418-X
	The Andalite Chronicles This book is divided into three parts. #1 - Elfangor's Journey, #2 - Alloran's Choice, and #3 - An Alien Dies. Each part was originally released as a separate book to school book clubs.	December 1997			c. 1976, the 1980s, and c. Spring 1997	Elfangor-Sirinial-Shamtul	ISBN 0-590-10971-5
14	The Unknown	January 1998		Horse (Minneapolis Max)		Cassie	0-590-49423-6
15	The Escape	January 1998		Hammerhead shark		Marco	0-590-49424-4
16	The Warning	March 1998		Rhinoceros		Jake	0-590-49430-9
17	The Underground	April 1998		Bat		Rachel	0-590-49436-8
18	The Decision	May 1998		Mosquito		Aximili-Esgarrouth-Isthill	0-590-49441-4
Megamorphs 2	In the Time of Dinosaurs	June 1998			Sario Rip time travel to 65,000,000 years ago	All six Animorphs	ISBN 0-590-95615-9
19	The Departure	July 1998		Black swallowtail butterfly		Cassie and Jake	0-590-49451-1
20	The Discovery	August 1998		King cobra snake		Marco	0-590-49637-9
21	The Threat	August 1998		Golden retriever dog (Homer)		Jake	0-590-76254-0
22	The Solution	September 1998		White rat		Rachel	0-590-76255-9
	The Hork-Bajir Chronicles	November 1998			1966, 1968-69, and 1998 In the year 1998, Jara Hamee tells Tobias about the Yeerk invasion of the Hork-Bajir home world. The events described happened in the 1960s.	Tobias, Aldrea-Iskillion-Falan, Dak Hamee, and Esplin 9466	ISBN 0-439-04291-7
23	The Pretender	November 1998		Human (past self)	Presumably 1998	Tobias	0-590-76256-7
24	The Suspicion	December 1998		Giant anteater		Cassie	0-590-76257-5
25	The Extreme	January 1999	Jeffrey Zeuhlke	Polar bear		Marco	0-590-76258-3
26	The Attack	February 1999		Siberian tiger		Jake	0-590-76259-1
27	The Exposed	March 1999	Laura Battyanyi-Weiss	Giant squid		Rachel	0-590-76260-5
28	The Experiment	March 1999	Amy Garvey	Cattle		Aximili-Esgarrouth-Isthill	0-590-76261-3
Alternamorphs 1	The First Journey	March 1999	Tonya Alicia Martin		It is a gamebook, also known as a Choose Your Own Adventure book. The story exists outside continuity.	Second person	ISBN 0-439-06164-4
29	The Sickness	May 1999	Melinda Metz	Yeerk (Illim)		Cassie	0-590-76262-1
Megamorphs 3	Elfangor's Secret	May 1999			Time Matrix time travel to October 25, 1415, December 25, 1776, October 21, 1805, 1934, June 6, 1944, and 1967.	All six Animorphs	ISBN 0-590-03639-4
30	The Reunion	June 1999	Elise Donner	Cockroach		Marco	0-590-76263-X
31	The Conspiracy	July 1999	Laura Battyanyi-Weiss	Peregrine falcon		Jake	0-439-07031-7
32	The Separation	July 1999		Starfish		Rachel	0-439-07032-5
33	The Illusion	August 1999	Ellen Geroux	Andalite (Aximili-Esgarrouth-Isthill)		Tobias	0-439-07033-3
34	The Prophecy	September 1999	Melinda Metz	Hork-Bajir (Jara Hamee)	During or after May 1999	Cassie and Aldrea-Iskillion-Falan	0-439-07034-1
35	The Proposal	October 1999	Jeffrey Zeuhlke	Poodle dog (Euclid)		Marco	0-439-07035-X
	Visser	October 1999			1976, the 1980s, and 1991-99	Edriss 562	ISBN 0-439-08764-3
36	The Mutation	November 1999	Erica Bobone	Orca (Swoosh)		Jake	0-439-10675-3
37	The Weakness	December 1999	Elise Smith	Cheetah		Rachel	0-439-10676-1
38	The Arrival	January 2000	Kimberly Morris	Northern harrier		Aximili-Esgarrouth-Isthill	0-439-10677-X
39	The Hidden	February 2000	Laura Battyanyi-Weiss	African Cape buffalo		Cassie	0-439-10678-8
40	The Other	March 2000	Gina Gascone	Honey bee		Marco	0-439-10679-6
Alternamorphs 2	The Next Passage	March 2000	Emily Costello		It is a gamebook, also known as a Choose Your Own Adventure book. The story exists outside continuity.	Second person	ISBN 0-439-14263-6
41	The Familiar	April 2000	Ellen Geroux	Human (future self) (not technically a morph)		Jake	0-439-11515-9
Megamorphs 4	Back to Before	April 2000			1990 and alternate time line of 1997	All six Animorphs	ISBN 0-439-17307-8
42	The Journey	May 2000	Emily Costello	African elephant		Rachel and Marco	0-439-11516-7
43	The Test	June 2000	Ellen Geroux	Taxxon		Tobias	0-439-11517-5
44	The Unexpected	July 2000	Lisa Harkrader	Kangaroo	January 2000	Cassie	0-439-11518-3
45	The Revelation	August 2000	Ellen Geroux	Black garden ant		Marco	0-439-11519-1
46	The Deception	September 2000	Elise Donner	Human (Joseph Felitti)		Aximili-Esgarrouth-Isthill	0-439-11520-5
47	The Resistance	October 2000	Ellen Geroux	North American beaver		Jake and Isaiah	0-439-11521-3
	The Ellimist Chronicles	October 2000			The events described happened billions of years in the past. However, they are being described in the year 2000.	Ellimist and Toomin	ISBN 0-439-21798-9
48	The Return	November 2000	Kimberly Morris	Super-Rachel (not technically a morph)		Rachel	0-439-11522-1
49	The Diversion	December 2000	Lisa Harkrader	German shepherd dog (Champ)		Tobias	0-439-11523-X
50	The Ultimate	January 2001	Kimberly Morris	Great horned owl		Cassie	0-439-11524-8
51	The Absolute	February 2001	Lisa Harkrader	Mallard duck		Marco	0-439-11525-6
52	The Sacrifice	March 2001	Kimberly Morris	Raccoon		Aximili-Esgarrouth-Isthill	0-439-11526-4
53	The Answer	April 2001		Anaconda		Jake	0-439-11527-2
54	The Beginning	May 2001		The heads of all six Animorphs are shown, from the side	2000, 2001, 2003, and maybe early 2004	All 6 Animorphs	0-439-11528-0

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)