A dying criminal confessed that his loot had been secreted "in the tower." It remained for the Hardy Boys to make an astonishing discovery that cleared up the mystery.
THE HOUSE ON THE CLIFF
The house had been vacant and was supposed to be haunted. Mr. Hardy started to investigate—and disappeared! An odd tale, with plenty of excitement.
THE SECRET OF THE OLD MILL
Counterfeit money was in circulation, and the limit was reached when Mrs. Hardy took some from a stranger. A tale full of thrills.
THE MISSING CHUMS
Two of the Hardy Boys' chums take a motor trip down the coast. They disappear and are almost rescued by their friends when all are captured. A thrilling story of adventure.
HUNTING FOR HIDDEN GOLD
Mr. Hardy is injured in tracing some stolen gold. A hunt by the boys leads to an abandoned mine, and there things start to happen. A western story all boys will enjoy.
THE SHORE ROAD MYSTERY
Automobiles were disappearing most mysteriously from the Shore Road. It remained for the Hardy Boys to solve the mystery.
THE SECRET OF THE CAVES
When the boys reached the caves they came unexpectedly upon a queer old hermit.
THE MYSTERY OF CABIN ISLAND
A story of queer adventures on a rockbound island.
THE GREAT AIRPORT MYSTERY
The Hardy Boys solve the mystery of the disappearance of some valuable mail.
Illustrated. Each Volume Complete in Itself.
No subject has so thoroughly caught the imagination of young America as aviation. This series has been inspired by recent daring feats of the air, and is dedicated to Lindberg, Byrd, Chamberlin and other heroes of the skies.
Individual Colored Wrappers and Illustrations by WALTER S. ROGERS
Each Volume Complete in Itself.
Thrilling tales of the great west, told primarily for boys but which will be read by all who love mystery, rapid action, and adventures in the great open spaces.
The Manly Boys, Roy and Teddy, are the sons of an old ranchman, the owner of many thousands of heads of cattle. The lads know how to ride, how to shoot, and how to take care of themselves under any and all circumstances.
The cowboys of the X Bar X Ranch are real cowboys, on the job when required but full of fun and daring—a bunch any reader will be delighted to know.
Durably Bound. Illustrated. Coloured Wrappers.
Every Volume Complete in Itself.
In these up-to the minute, spirited genuine stories of boy life there is something which will appeal to every boy with the love of manliness, cleanness and sportsmanship in his heart.
Every boy wants to know how to play ball in the fairest and squarest way. These books about boys and baseball are full of wholesome and manly interest and information.
THIRD BASE THATCHER, By Everett Scott.
Illustrated. Every Volume Complete in Itself.
Mr. Adams, the author of this flying series for boys is an experienced aviator and has had many thrilling adventures in the air—both as a member of the famous Lafayette Escadrille in the World War and in the United States Naval Aviation Service flying with the squadrons patrolling the Atlantic Coast. His stories reveal not only his ability to tell daring and exciting air episodes but also his first hand knowledge of modern aeroplanes and the marvelous technical improvements which have been made in the past few years. Andy Lane flies the latest and most highly developed machines in the field of aviation.
FIFTEEN DAYS IN THE AIR
Andy refuels his ship in the air and sets a new endurance record.
OVER THE POLAR ICE
In a giant flying boat Andy beats his enemy in a dash to the South Pole.
RACING ROUND THE WORLD
In a series of thrilling flights Andy wins an air dash around the globe to win a $100,000 prize.
THE RUNAWAY AIRSHIP
Through foggy skies Andy Lane brings back the world's greatest passenger carrying dirigible, blown away on the wings of a storm.
PIRATES OF THE AIR
Andy Lane pilots the giant passenger plane Apex No. 4 across the Atlantic in the face of almost overwhelming odds.
ON THE WINGS OF FLAME
Andy makes a forced landing in the South American jungle in the dead of night and has thrilling experiences with the natives.
THE FLYING WINDMILL
Andy Lane and his restless crew take off in a monster autogyro in search of pirate treasure.
Illustrated. Individual Colored Wrappers.
Tales of old Western pioneer days and the California gold fields; tales of mystery, humor, adventure; thrilling stories of sports and aviation. There is a wide range of subjects in this list of titles—all by well-known authors of books for boys.