Book 1

The Secret of Terror Castle

by Robert Arthur, Alfred Hitchcock
Sep 12, 1964
English
Hardcover

Book 2

Book 3

The Mystery of the Fiery Eye

by Robert Arthur, Roger Hall
Jan 1, 1967
English
Hardcover

Book 4

Jan 1, 1968
English
Hardcover
Jan 1, 2012
Finnish
Hardcover

Book 5

Jan 1, 1969
English
Hardcover

Book 6

3.0 (1)
Jan 1, 1975
English
Hardcover

Book 7

Jan 1, 1970
English
Hardcover

Book 11

The Secret of Skeleton Island

by Robert Arthur, Harry Kane
Jan 1, 1966
English
Hardcover
Apr 1, 2011
German
Kindle

3 etsivää ja Pääkallosaari

by Robert Arthur, Leena Brummer
Jan 1, 1973
Finnish
Hardcover

Book 12

Book 13

Sep 12, 1968
English
Hardcover

Book 14

4.0 (1)
Jun 10, 2024
English
Kindle

Book 16

Jan 1, 1975
English
Hardcover
Jul 5, 2013
German
Kindle

Book 17

The Mystery of Monster Mountain

by M.V. Carey, Alfred Hitchcock
Jan 1, 1973
English
Hardcover

Book 18

Jul 12, 1973
English
Hardcover

Book 19

3.0 (1)
Nov 1, 1975
English
Hardcover

Book 20

Dec 27, 1978
English
Paperback

Book 21

Aug 12, 1975
English
Hardcover

Il cane invisibile

by Alfred Hitchcock, M.V. Carey
Jan 1, 1976
Italian
Paperback

Book 22

Aug 12, 1971
English
Hardcover

Book 23

Il diavolo danzatore

by Alfred Hitchcock, William Arden
Jan 1, 1978
Italian
Paperback
Sep 12, 1976
English
Hardcover

Book 24

Jan 1, 1980
English
Paperback
Sep 12, 1976
English
Hardcover

Book 25

The Mystery of the Headless Horse

by William Arden, Jack Hearne, Alfred Hitchcock
Jan 1, 1977
English
Hardcover

Book 26

Sep 12, 1985
English
Hardcover

Book 27

Book 28

Jan 1, 1996
Polish
Paperback

The Mystery of the Deadly Double

by William Arden, Alfred Hitchcock
Oct 12, 1978
English
Hardcover

Book 29

Jul 5, 2013
German
Kindle
Sep 12, 1979
English
Paperback

Το μυστήριο του υφάλου του καρχαρία

by William Arden, Πέρσα Κουμούτση
Dec 1, 1995
Greek
Hardcover

Book 31

Book 32

Oct 20, 1992
English
Hardcover

Book 33

Sep 12, 1982
English
Hardcover

Book 34

3.0 (1)
Sep 12, 1982
English
Hardcover

Misterio del hombre de las cavernas

by M.V. Carey, C. Peraire del Molino
Jan 1, 1982
Spanish
Hardcover

Book 35

Book 36

Sep 12, 1983
English
Hardcover

Book 37

Feb 12, 1984
English
Paperback

Book 38

Sep 17, 1991
English
Paperback

Book 39

Sep 12, 1984
English
Hardcover

Book 40

Mar 12, 1985
English
Paperback

Book 41

The Case of the Weeping Coffin

by Megan Stine, Henry William Stine
Mar 12, 1985
English
Hardcover

Book 42

Sep 12, 1985
English
Paperback

Book 43

Mar 12, 1985
English
Paperback

Book 44

Sep 12, 1986
English
Paperback

Book 47

Die drei ??? und die gefährlichen Fässer

by G.H. Stone, Robert Arthur, Aiga Rasch
Jul 5, 2013
German
Kindle

Rough Stuff

by G.H. Stone
Jan 1, 1989
English
Paperback

Book 48

MURDER TO GO

by Megan Stine
Apr 19, 1989
English
Hardcover

Book 49

Hot Wheels

by Robert Arthur
Apr 19, 1989
English
Hardcover

Book 50

Reel Trouble

by G.H. Stone
Feb 10, 1990
English
Hardcover

Book 51

Die drei ??? und der verschwundene Filmstar (drei Fragezeichen)

by Megan Stine, Henry William Stine, Aiga Rasch
Oct 7, 2013
German
Kindle

Thriller Diller

by Megan Stine, Henry William Stine
Jul 29, 1989
English
Paperback

Book 52

An Ear For Danger

by Marc Brandel
Jun 24, 1989
English
Paperback

Vlucht naar het gevaar

by Marc Brandel
Jan 1, 1990
English
Paperback

Το μυστήριο του ράντσου της προδοσίας

by Marc Brandel, Δημήτρης Π. Κωστελένος
Sep 1, 2004
Greek
Hardcover

Book 53

Long Shot

by Megan Stine, Henry William Stine
Mar 9, 1993
English
Paperback

Book 54

Foul Play

by Peter Lerangis
English
Paperback

Book 55

Fatal Error

by G.H. Stone
Nov 21, 1990
English
Paperback

Book 1, 16, 3

Book 1, 19

Jan 1, 1980
German
Hardcover

Book 1-2

Book 22 & 14

Jan 1, 1979
German
Hardcover

Book 36, 7

Die drei ???. Top Secret Edition

by Peter Lerangis, Gayle Lynds, Megan Stine
Apr 8, 2011
German
Hardcover