It's The HEIGHT of FRIGHT! (original poster)
There's TERROR In Every Clue!
DEATH FIRES THE STARTING GUN!...and you'll be breathless at the finish!
Death rides the clouds
THE RIDDLE OF THE "KNIVES OF DEATH!" (original print ad - all caps)
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!