First Edition. Snell dustjacket art. Fabulous 'yellow peril' mystery. "An American millionaire who is sponsoring a movement for the deportation and exclusion from the United States of the Yellow race". Very uncommon. Nearly Very Good, front inner hinge has been tightened, causing front endpaper to adhere to front pastedown at inner edge, in Good dustjacket, yellow scotch tape at exterior spine ends and top front flap corner, yellowed scotch tape at verso of flap and spine edges.