"The Last Olympian" received overwhelmingly positive reviews. "Publishers Weekly" wrote "...fans will not be disappointed" and remarked "As the capstone to this beloved series, this story satisfies." They praised Percy's "brave leadership" and said that "the final clash would keep a Hollywood special effects team busy for years." "Booklist"'s starred review commented that "...Riordan’s imagination soars in the climactic battle scenes" but said that he manages to "bring the whole series to a satisfying close in the down-to-earth conclusion." It also received starred reviews from "Kirkus".