Roy J. Snell

Lost In The Air

The Blue Envelope

Jet Plane Mystery

Jane Withers And The Phantom Violin

Whispers At Dawn; Or, The Eye

The Secret Mark

The Red Lure

The Firebug

The Galloping Ghost

Green Eyes

The Cruise Of The O Moo

The Crystal Ball

The Purple Flame

White Fire

On The Yukon Trail

The Firebug

The Purple Flame

Little White Fox And His Arctic Friends

The Purple Flame

The Secret Mark

The Firebug

Sparky Ames Of The Ferry Command

White Fire

Panther Eye

Norma Kent Of The Wacs

A Ticket To Adventure

Third Warning

Third Warning

Mystery Wings

Sparky Ames Of The Ferry Command

The Shadow Passes

Gypsy Flight

Jet Plane Mystery

Red Dynamite

The Crystal Ball

The Shadow Passes

Sally Scott Of The Waves

Mystery Wings

Jet Plane Mystery

Norma Kent Of The Wacs

Gypsy Flight

Sally Scott Of The Waves

Curlie Carson Listens In

The Purple Flame; A Mystery Story For Girls

Triple Spies