Snell, Roy J.

Triple Spies

The Purple Flame; A Mystery Story For Girls

Lost In The Air

Sign Of The Green Arrow

Johnny Longbow

Jet Plane Mystery

Mystery Wings

The Blue Envelope

Mystery Wings; A Mystery Story For Boys

The Secret Mark

Sparky Ames Of The Ferry Command

Lost In The Air

The Crimson Thread; An Adventure Story For Girls

The Blue Envelope

The Blue Envelope

The Galloping Ghost

The Arrow Of Fire; A Mystery Story For Boys

Sparky Ames Of The Ferry Command

A Ticket To Adventure

The Shadow Passes

Red Dynamite

Mystery Wings

Jet Plane Mystery

Red Dynamite (Boys Mystery Series, Book 19)

The Galloping Ghost (Boys Mystery Series, Book 16)

The Magic Curtain: A Mystery Story For Girls

The Crimson Flash: Mystery Stories For Boys (1922)

Little White Fox And His Arctic Friends

Curlie Carson Listens In