Scarce first printing of this installment in Corliss's ambitious and entertaining series of sourcebooks on the unknown.

First printing of this essential guide to the secret movements of the earth and the manifold horrors that fall from the skies.

First edition of the first American scientific book illustrated with a photograph, an exploration of fossilized dinosaur tracks (what Warren calls "footsteps of an unknown animal") inscribed to fellow surgeon and Benjamin Franklin's great-grandson, Franklin Bache.