A regular thriller, honest in its use of Hawaiian sports and possible submarine hideaways, ["Larry and the Undersea Raider"] begins with surfboard riding so vividly reported that it makes the muscles ache as well as the nerves tingle…. [Larry decides] that surfboard riding is the king of sports and easy to do, and [learns] the fallaciousness of that second statement, all before the opening chapters are over. They introduce him to a handsome Hawaiian aristocrat of his own age….

[Something] deadly is going on under water. An undersea raider is sinking ships with supplies for Australia. The father of the Hawaiian youth knows something valuable in locating the submarine's hideout: the American lad, whose father has been ordered to sea on a similar mission, goes off on an adventure of his own that lands him on board the Japanese submarine as an involuntary passenger. One of the boys...