By L. P. WYMAN
Author of "The Golden Boys" and "The Lakewood Boys" Series

Bill and Gordon Hunniwell, two enterprising and inventive young Americans, have many thrilling experiences far above the clouds in the "Albatross," their new electric airplane. Their adventures with the Secret Service and narrow escapes in the fog, when searching for the lost German aviators, are admirably described in this new series.

THE HUNNIWELL BOYS IN THE AIR

THE HUNNIWELL BOYS' VICTORY

THE HUNNIWELL BOYS IN THE SECRET SERVICE

THE HUNNIWELL BOYS AND THE PLATINUM MYSTERY

THE HUNNIWELL BOYS' LONGEST FLIGHT

A. L. BURT COMPANY, Publishers

114-120 EAST 23d STREET NEW YORK