<P> They catch up with the thief, Ethan Nakamura, just as the last petal falls off the flower because Ethan has revived the Titan Iapetus . At the culmination of their fight, Percy flings Iapetus into the river Lethe, a river that erases memories . Only Percy's powers as the son of Poseidon can keep him dry . Percy tells the now mind - wiped Iapetus that his name is Bob and that they are friends . When the three heroes and "Bob" return to Hades and Persephone with the sword, Hades is very unhappy about the sword and leaves in anger, threatening Persephone never to disobey him again . By this, they know that Persephone commissioned the sword against Hades' orders . (However, Percy saw a look of "hunger" in Hades' eyes while he stared at the sword .) </P> <P> The book contains fictional interviews with multiple characters at Camp Half - Blood . Those include the Stoll Brothers, Annabeth Chase, Percy Jackson, Grover Underwood, and Clarrise La Rue . </P> <P> The book received mixed reviews . Publishers Weekly criticized it saying, "Bland illustrations depicting the contents of Annabeth's trunk, a map of Camp Half - Blood and a short' sneak peek' at the book The Last Olympian pad the contents (barely) to book length; the inclusion of a crossword puzzle and a word search makes the book difficult to share . Not a must - read - but try telling that to rabid fans ." School Library Journal reviewer Tim Wadham commended the writing, saying, "Despite the fact that this is more of a marketing package than anything else, the quality of and interest in the three stories likely justifies its purchase ." </P>

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