An under sea adventure story in a submarine, one saga in his famous Tom Swift series, this hardcover book was issued in 1960. Missing Dust jacket. Shows some wear on back left upper corner, and on all other covers some wear from usage by 4 - boys/bros in our family when they were Tweens. Hope some young lad you know will like reading it. From 1960. Bluish mesh look about hardback's cover with illustration of Tom Swift on right side of front cover.