This story is just full of exciting and fearful experiences on the sea.

DON St.u.r.dY AMONG THE GORILLAS;

A thrilling story of adventure in darkest Africa. Don is carried over a mighty waterfall into the heart of gorilla land.

THE RADIO BOYS SERIES (Trademark Registered)

By ALLEN CHAPMAN

Author of the "Railroad Series," Etc.

Individual Colored Wrappers. Ill.u.s.trated. Every Volume Complete in itself.

A new series for boys giving full details of radio work, both in sending and receiving--telling how small and large amateur sets can be made and operated, and how some boys got a lot of fun and adventure out of what they did. Each volume from first to last is so thoroughly fascinating, so strictly up-to-date and accurate, we feel sure all lads will peruse them with great delight.

Each volume has a Foreword by Jack Binns, the well-known radio expert.

THE RADIO BOYS' FIRST WIRELESS THE RADIO BOYS AT OCEAN POINT THE RADIO BOYS AT THE SENDING STATION THE RADIO BOYS AT MOUNTAIN Pa.s.s THE RADIO BOYS TRAILING A VOICE THE RADIO BOYS WITH THE FOREST RANGERS THE RADIO BOYS WITH THE ICEBERG PATROL THE RADIO BOYS WITH THE FLOOD FIGHTERS THE RADIO BOYS ON SIGNAL ISLAND THE RADIO BOYS IN GOLD VALLEY

THE RAILROAD SERIES

By ALLEN CHAPMAN

Author of the "Radio Boys," Etc.

Uniform Style of Binding, ill.u.s.trated. Every Volume Complete in Itself.

In this line of books there is revealed the whole workings of a great American railroad system. There are adventures in abundance--railroad wrecks, dashes through forest fires, the pursuit of a "wildcat"

locomotive, the disappearance of a pay car with a large sum of money on board--but there is much more than this--the intense rivalry among railroads and railroad men, the working out of running schedules, the getting through "on time" in spite of all obstacles, and the manipulation of railroad securities by evil men who wish to rule or ruin.

RALPH OF THE ROUND HOUSE; Or, Bound to Become a Railroad Man.

RALPH IN THE SWITCH TOWER; Or, Clearing the Track.

RALPH ON THE ENGINE; Or, The Young Fireman of the Limited Mail.

RALPH ON THE OVERLAND EXPRESS; Or, The Trials and Triumphs of a Young Engineer.

RALPH, THE TRAIN DISPATCHER; Or, the Mystery of the Pay Car.

RALPH ON THE ARMY TRAIN; Or, The Young Railroader's Most Daring Exploit.

RALPH ON THE MIDNIGHT FLYER; Or, The Wreck at Shadow Valley.

RALPH AND THE MISSING MAIL POUCH; Or, The Stolen Government Bonds.

THE RIDDLE CLUB BOOKS By ALICE DALE HARDY

Individual Colored Wrappers. Attractively Ill.u.s.trated. Every Volume Complete in Itself.

Here is as ingenious a series of books for little folks as has ever appeared since "Alice in Wonderland." The idea of the Riddle books is a little group of children--three girls and three boys decide to form a riddle club. Each book is full of the adventures and doings of these six youngsters, but as an added attraction each book is filled with a lot of the best riddles you ever heard.

THE RIDDLE CLUB AT HOME

An absorbing tale that all boys and girls will enjoy reading. How the members of the club fixed up a clubroom in the Larue barn, and how they, later on, helped solve a most mysterious happening, and how one of the members won a valuable prize, is told in a manner to please every young reader.

THE RIDDLE CLUB IN CAMP

The club members went into camp on the edge of a beautiful lake. Here they had rousing good times swimming, boating and around the campfire.

They fell in with a mysterious old man known as The Hermit of Triangle Island. n.o.body knew his real name or where he came from until the propounding of a riddle solved these perplexing questions.

THE RIDDLE CLUB THROUGH THE HOLIDAYS

This volume takes in a great number of winter sports, including skating and sledding and the building of a huge snowman. It also gives the particulars of how the club treasurer lost the dues entrusted to his care and what the melting of the great snowman revealed.

THE RIDDLE CLUB AT SUNRISE BEACH

This volume tells how the club journeyed to the seash.o.r.e and how they not only kept up their riddles but likewise had good times on the sand and on the water. Once they got lost in a fog and are marooned on an island. Here they made a discovery that greatly pleased the folks at home.