The Harpers of Titan
in: Dr. Cyclops, New York : Popular Library, 1967, 127 p., 18 cm. –
(Popular Library Edition) NUC: 77-3944
Bound with: Dr. Cyclops (Henry Kuttner); Too Late for Eternity (Bruce Walton)
Three darling journeys into the future of man and the universe.
Captain Future and his Futuremen face a hideous peril as Simon Wright, the living Brain, is implanted in a human body

Quest Beyond the Stars
New York : Popular Library, 1969. –
142 p. ; 18 cm. – (Popular Library ; 60-2389)
Cover: Jeff Jones
“Captain Future penetrates forbidden space to challenge the evil creatures who lie in wait” — Cover
Venture into darkest space
Mercury is slowly dying. Each year its air grows thiner. Each month thousands of broken Mercurians are ordered to leave their planet.
They have only one hope. Captain Future, the Solar System’s most daring agent, has promised to restore their world – a next to impossible task.
The solutions lies beyond the stars … at the very core of the universe where no man has ventured before. There, in the shadow of doom, Captain Future meets the mightiest of all evil beings – creatures he may not live to describe …
Book Reviews:

• Luna Monthly. 1:31. June, 1969. (D. Paskow)

• Venture Science Fiction. 3(2):123-124. August. 1969. (R. Goulart)

Planets in Peril
New York : Popular Library, 1969. –
128 p. ; 18 cm. – (Popular Library ; 60-2416)
“Captain Future plunges into the deadly abyss of an unknown dimension – to reach a dying universe” — cover
Visit from another universe
They were the first arrivals from the other side of the cosmos.
With the help of the Martian scientist Thrin, they had crossed the whirling black abyss of the fourth dimensional – a dimension that had never been reached before.
Now a man with skin of pure marble-white and a woman of unearthly beauty stood before the disbelieving eyes of Captain Future and the Futuremen. The strange couple stared back in awe and amazement – particularly at Captain Future.
“Here is the one,” the man said finally in his alien tongue. “He is the only one who can save us!”

Galaxy Mission (The Triumph of Captain Future) (CF#4)
New York : Popular Library, 1969. –
128 p. ; 18 cm. – (Popular Library ; 60-2437) pbk
ELIXIR OF EVIL
They Called him the Life-Lord and the deadly milk-white elixir that his syndicate pushed was called Lifewater.
As promised, Lifewater brought youth to the old. Women who were losing their once cherished beauty, en who were losing their strength gave their life’s savings for a vial of the magic substance. What they did not know was that the powerful brew could cause sudden and violent death.
As the fatal youth epidemic spreads throughout the Solar System, Captain Future battles with time and danger to save his fellow beings from doom – only to find himself trapped in a master fiend’s plot to conquer the solar system.

The Comet Kings
New York : Popular Library, 1969. –
127 p. ; 18 cm. – (Popular Library ; 60-2407)
“Trapped in the blazing depths of Halley’s comet, the futuremen battle four-dimensional monsters” — Cover
What was the cosmic terror that swallowed spaceships whole?
One by one the Solar System’s ships were disappearing in mid-space – as if a mighty colossus had grabbed them up and swallowed them whole.
Top agents Joan Randall and Ezra Gurney were sent to investigate. Like the others, somewhere beyond Jupiter, they disappeared.
Captain Future heard the news with shocked horror. Whatever the danger, he had to stop this menacing evil force. Whatever the risk, he had to find lovely Joan Randall – the woman he love …
Book Review

• Lovisi, Gary, “Comet Kings: From Pulps to Paperbacks,” in:   Paperback Parade  No. 1:16-18.  October 1986.

Captain Future’s Challenge
New York : Popular Library, 1969. –
128 p. ; 18 cm. – (Popular Library ; 60-2430)
“The mighty avenger of cosmic evil takes his most daring plunge – towards the raging flames of the sun …” — Cover
CAPTAIN FUTURE FACES FIERY SOLAR DEATH
It was ten o’clock, solar time, when disaster struck. At exactly the same moment, gravium mines on Mercury, Mars and Saturn were totally destroyed by an unidentified army. Without gravium – the life-blood of interplanetary civilization – the system would perish.
Meanwhile, Captain Future struggled on the floor of a moving space craft, his arms and legs bound by steel ropes. He did not know why he’d been captured – only that the system was in grave danger – that he was needed…
As Captain Future was plunged through space, towards a deadly orb of flaming gases – the raging inferno of the sun – he planned his daring escape. It was to be the most dangerous gamble of his life.