the key to an adventure
that would plunge his American friends into both darkness and danger
in the fabled, terrifying Caves of Korse Lenken, a story to be related
in the next volume,

THE CAVERNS OF FEAR.

* * * * *

THE RICK BRANT

Science-Adventure Stories

BY JOHN BLAINE

Rick Brant and his pal, Scotty, have the kind of adventures all boys
would like to have. They live on an island called Spindrift where
Rick's father heads a group of scientists working in the field of
electronics. Here and abroad, the boys encounter many thrilling
adventures and solve many baffling mysteries.

THE ROCKET'S SHADOW

THE LOST CITY

SEA GOLD

100 FATHOMS UNDER

THE WHISPERING BOX MYSTERY

THE PHANTOM SHARK

SMUGGLERS' REEF

THE CAVES OF FEAR

Grosset & Dunlap _Publishers_

NEW YORK 10, N.Y.

* * * * *

THE KEN HOLT MYSTERY STORIES

By Bruce Campbell

Ken Holt, son of a world-famous foreign correspondent, and Sandy
Allen, of the redheaded Allen clan, join forces at a time when Ken is
very much in need of help. They fall into the thick of a mystery as
readily as a duck takes to water, and no sooner are they on the scent
than the suspense begins to mount and every reader knows he is in for
a thrilling time.

THE SECRET OF SKELETON ISLAND

Ken and Sandy solve the mystery of the strange goings-on at the
exclusive resort on Skeleton Island.

THE RIDDLE OF THE STONE ELEPHANT

In Colorado gathering data for Ken's dad about an old lawsuit between
two ranchmen over water rights, Ken and Sandy find every move
thwarted, every action watched.

THE BLACK THUMB MYSTERY

Ken and Sandy prove the innocence of a banker who has been found
guilty of conspiracy in a robbery. The boys track down many clues
before they discover the motive behind the sinister plot.

THE CLUE OF THE MARKED CLAW

Vacationing in a fishing village on Long Island, Ken and Sandy play an
unexpected part in the capture of a dangerous ring of smugglers.

GROSSET & DUNLAP

Publishers of WORDS: _The New Dictionary_

NEW YORK 10, N. Y.

* * * * *

THE HARDY BOYS

_Mystery Stories_

By FRANKLIN N. DIXON

All boys from 11 to 15 who like lively adventure stories, packed with
mystery and action, will want to read every one of the exciting Hardy
Boys stories listed below. Sons of a famous American detective,