Death rides the clouds
THE MASTER OF MYSTERY EXPOSES A GENIUS OF CRIME! (original print ad - all caps)
There's TERROR In Every Clue!
It's The HEIGHT of FRIGHT! (original poster)
DEATH FIRES THE STARTING GUN!...and you'll be breathless at the finish!
Death in the electric chair faces Charlie Chan... at the hands of a murderer twelve years dead!
it's Chan's most Spine-tingling mystery!
THE RIDDLE OF THE "KNIVES OF DEATH!" (original print ad - all caps)