Attack from Atlantis
Teen-aged Don Miller felt lucky to be one of the few aboard the atomic-powered submarine, the Triton, on its first official depth test run. Even when the ship began to falter and the diving planes jammed, neither he nor the rest of the crew realized they were fighting a losing battle against an unknown enemy. Quick repairs and a frantic attempt to surface brought renewed hope to the crew until they spotted strange-looking "bubble men" lashing through the water on creatures supposed to have been extinct millions of years before...
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Lester del Rey
Lester del Rey (1915–1993) was an American science fiction author and editor. Del Rey is especially famous for his juvenile novels such as those which are part of the Winston Science Fiction series, and for Del Rey Books, the fantasy and science fiction branch of Ballantine Books edited by Lester del Rey and his fourth wife Judy-Lynn del Rey.
Lester del Rey used these pseudonyms: Philip St. John, Kenneth Wright, Erik van Lhin, Charles Satterfield, Edson McCann, John Alvarez, Marion Henry, Philip James, Wade Kaempfert, Ramon F. Alvarez-del Rey and Cameron Hall.

