The launching of this Twentieth Century series marks the inauguration of a new era in boys' books--the "wonders of modern science" epoch. Frank and Harry Chester, the Boy Aviators, are the heroes of this exciting, red-blooded tale of adventure by air and land in the turbulent Central American republic. The two brothers with their $10,000 prize aeroplane, the Golden Eagle, rescue a chum from death in the clutches of the Nicaraguans, discover a lost treasure valley of the ancient Toltec race, and in so doing almost lose their own lives in the Abyss of the White Serpents, and have many other exciting experiences, including being blown far out to sea in their air-skimmer in a tropical storm. It would be unfair to divulge the part that wireless plays in rescuing them from their predicament. In a brand new field of fiction for boys the Chester brothers and their aeroplane seem destined to fill a top-notch place. These books are technically correct, wholesomely thrilling and geared up to third speed.