Robert Arthur Jr. books in order

Robert Arthur Jr. has one series here, 10 books in all, about 52 hours of reading.

The Three Investigators 18 books · 52 hours

Book 1 · 1964

The Secret of Terror Castle

165 pages, about 3 hours 4.0★ (2)

BORROW FREE
Book 2 · 1964

The Mystery of the Stuttering Parrot

169 pages, about 3.1 hours 3.3★ (3)

BORROW FREE
Book 3 · 1965

The Mystery of the Whispering Mummy

160 pages, about 2.9 hours 4.0★ (3)

BORROW FREE
Book 4 · 1965

The Mystery of the Green Ghost

172 pages, about 3.1 hours 4.0★ (3)

BORROW FREE
Book 5 · 1966

The Mystery of the Vanishing Treasure

152 pages, about 2.8 hours 4.0★ (2)

BORROW FREE
Book 6 · 1966

The Secret of Skeleton Island

158 pages, about 2.9 hours 4.0★ (1)

BORROW FREE
Book 7 · 1967

The Mystery of the Fiery Eye

149 pages, about 2.7 hours 4.0★ (2)

BORROW FREE
Book 8 · 1967

The Mystery of the Silver Spider

149 pages, about 2.7 hours 4.0★ (2)

BORROW FREE
Book 9 · 1968

The Mystery of the Screaming Clock

177 pages, about 3.2 hours 4.0★ (2)

BORROW FREE
Book 10 · 1968

The Mystery of the Moaning Cave

160 pages, about 2.9 hours 3.5★ (2)

BORROW FREE
Book 11 · 1969

The Mystery of the Talking Skull

162 pages, about 3 hours 4.3★ (3)

BORROW FREE
Book 12 · 1969

The Mystery of the Laughing Shadow

163 pages, about 3 hours 3.0★ (2)

BORROW FREE
Book 14 · 1970

The Mystery of the Coughing Dragon

160 pages, about 2.9 hours 4.0★ (1)

BORROW FREE
Book 16 · 1971

The Mystery of the Nervous Lion

150 pages, about 2.8 hours 4.0★ (1)

BORROW FREE
Book 17 · 1972

The Mystery of the Singing Serpent

152 pages, about 2.8 hours 3.0★ (1)

BORROW FREE
Book 19 · 1973

The Secret of Phantom Lake

148 pages, about 2.7 hours 4.0★ (1)

BORROW FREE
Book 23 · 1975

The Mystery of The Invisible Dog

152 pages, about 2.8 hours 4.0★ (1)

BORROW FREE
Book 44 · 1985

The Case of the Weeping Coffin

124 pages, about 2.3 hours 4.0★ (1)

BORROW FREE