The Battle of the Labyrinth

Percy Jackson attends freshman orientation at Goode High School, where he sees Rachel Elizabeth Dare, a mortal who can see through the Mist. She helps him fight two empousai and escape. Percy travels to Camp Half-Blood, where he learns Grover is in trouble with the Council of Cloven Elders for not having found Pan. During a competition organized by the new sword instructor Quintus, Annabeth and Percy accidentally find an entrance into the Labyrinth, which presents a possible invasion route for Luke. Annabeth is given leadership of a quest to find Daedalus and convince the inventor not to give Luke Ariadne's string, which would help him navigate the Labyrinth. She chooses Grover, Percy, and Tyson to accompany her. Before leaving, Percy learns that Nico plans to bring back his late sister (with help from King Minos) by exchanging her soul for someone who has cheated death - like Percy. In the maze, the questers face a number of trials including meeting Briares, the Sphinx, and Janus, before arriving at the ranch of Geryon and meeting Nico. They seek out Hephaestus, and after speaking to him they part ways; Tyson and Grover search for Pan, while Annabeth and Percy go to the god's forge in the volcano Mount St. Helens.

In the forge, Percy is almost killed by Kronos's smiths, but escapes by causing an earthquake that ejects him from the volcano. When Percy awakens, he finds himself on the island Ogygia with Calypso, a daughter of the Titan Atlas. Calypso tells Percy she is cursed to fall in love with every hero that lands on her island, but the hero can never stay. After Hephaestus tells him of events in the mortal world, Percy realizes that he too must leave. Back at Camp Half-Blood, Percy and Annabeth go to Manhattan to find Rachel, who should be able to navigate the Labyrinth. Despite being captured by Luke's minions, they eventually reach Daedalus's workshop and learn Quintus is actually the ancient inventor, living as an automaton. He informs them that, believing they could not withstand a Titan assault, he has already helped Luke. The group is discovered by Luke, who tells them Minos has been planning to exchange Daedalus's soul for his own. The four teenagers fight to escape while the betrayed Daedalus remains in the maze with his hellhound.

The quartet later discover the Titan fortress at Mount Othrys, and learn that Luke has been somehow possessed by Kronos. They run into Grover and Tyson, and discover the resting place of Pan, who speaks to them and passes part of his fading spirit into each of them. The group, minus Rachel, then heads back to Camp Half-Blood to fight. The Titan army floods out of the Labyrinth and appears to be winning until Daedalus arrives with Mrs. O’Leary and Briares, who kills Kampê. Grover scares off the remaining Titan forces by causing a Panic. After the battle, Nico helps Daedalus pass on, destroying the Labyrinth. After a memorial service for the dead campers, Percy leaves camp for the school year. On his fifteenth birthday at summer's end, Percy receives a visit from his father Poseidon, who gives him a sand dollar, advising him to “spend it wisely”.[3] Nico later appears to tell Percy his plan to defeat Luke once and for all.[3][4]

Rick Riordan, the author, at the release of The Battle of the Labyrinth

The Battle of the Labyrinth was initially referred to as Percy 4 until the title was officially revealed.[5] The novel was teased by Rick Riordan behind the pages of its predecessor, The Titan's Curse.[6] It was based on the Greek myth of the labyrinth, where the Minotaur was supposedly kept. In his book, Riordan made the labyrinth grow to cover the entire undergrowth of United States.[7]

On October 4, 2007, Publishers Weekly revealed the book's title along with the cover art by John Rocco.[8] A preview of the book was read out for kids to judge, and the reactions were "unbelievable", according to the author.[7] Riordan went on a tour to promote the book.[9][7] He revealed that he would read a sneak peek of the first chapter at Barnes & Noble, Utah.[10] In January 2008, he read a sneak peek of the first chapter.[11][12]

A trailer video was also uploaded on YouTube.[13] In the same year, in February, an advertisement video was officially released.[14] Riordan was bothered with the previous novel's plot leaking out due to advance reader copies (ARC) and as a result, the novel had no ARC prints.[15] A month before the novel's release, Riordan revealed his tour plans.[16] Shortly after the book's publication, Riordan spoke at the May 30 Evening with Children's Booksellers, as part of the 2008 BookExpo America.[17][18] At this time, the Percy Jackson series was the third bestselling children's book series in America, behind the Twilight Saga and The Clique series, according to Publishers Weekly.[19]

The Battle of the Labyrinth was first published as a hardcover in the United States on May 6, 2008 by Hyperion Books for Children, an imprint of Disney Publishing Worldwide, and had a first printing of about one million copies.[2][20] On May 13, 2008, a ten-hour and 32 minute audiobook version of The Battle of the Labyrinth, read by actor Jesse Bernstein, who also read the audiobooks of the previous 3 books in the series, was published worldwide by Listening Library.[21][22][23]

The novel was also on the Amazon Children's bestseller list[24] and the Publishers Weekly Facts and Figures bestseller list, having sold nearly 105,000 copies in 2010 since its release in 2008.[25] It was released in the United Kingdom with new covers.[26]

Since its release, The Battle of the Labyrinth has been translated into Bulgarian, Catalan (Valencian), Chinese, Czech, Danish, Dutch, Estonian, Finnish, French, German, Greek, Hebrew, Hungarian, Indonesian, Italian, Lithuanian, Norwegian, Persian, Polish, Portuguese, Romanian, Russian, Slovak, Slovenian, Spanish, Swedish, Thai, Turkish and Vietnamese.[27] Although many non-English editions used John Rocco's cover art, a few – and the Puffin editions – have unique covers by other illustrators.[27]

The book received a Lexile score of 590L, making it age- and difficulty-appropriate for the average of 10-13 year-old.[28] Scholastic suggests the book for grades 6-12.[29] VOYA recommended the novel for children in grades 7-12.[30]

The Battle of the Labyrinth received mostly positive reviews. It has been praised as an excellent continuation to the Percy Jackson & the Olympians series as well as an excellent novel in its own right. Kirkus Reviews, for example, in its starred review, called the novel "[Riordan's] best one yet...[it] rivals Rowling for inventive, magical storytelling. The often-philosophical tale zips along with snappy dialogue, humor and thrilling action... This volume can stand alone, but no reader will be able to read just one."[2] Children's Literature made similar claims: "Riordan creates a masterful weaving of Greek mythology and traditional fantasy in this latest book... Fans will enjoy the latest adventures of their favorite characters, and those picking the book up for the first time will have no trouble falling into this magical world."[31]

Other reviews focused more on the novel as a continuation to the series. Anita Burkam of Horn Book Magazine said in her review of the novel, "The melding of Greek myths with modern-day settings remains fresh and funny in this fourth installment".[32] David Goodale of VOYA also remarks on Riordan's ability to "keep the material fresh" despite the "far-from-new" quest format.[30] Publishers Weekly's starred review states, "One of Riordan's strengths is the wry interplay between the real and the surreal", adding, "the wit, rousing swordplay and breakneck pace [in this installment] will once again keep kids hooked."[33] The website KidsReads similarly praised the book, saying "the story arc has remained unified and compelling."[34] The Los Angeles Times gave another positive review, calling it "a glorious, no-holds-barred adventure with great plot twists, a melding of ancient and bionic technology and a cliffhanger ending that will have fans eagerly awaiting the fifth and final showdown between gods and monsters next year."[35]

Matt Berman of Common Sense Media was one of few reviewers to mention the differences between this book and preceding ones in the series. He highlights The Battle of the Labyrinth's darker tone, more mature themes, and increased discussion of what it philosophically means for the characters to follow and support the Greek gods and Titans. He concludes, "Up until now the series has been great fun, but little more. Now as it begins to grow, like the Labyrinth, larger and deeper and more complex, it's even more fun."[36]

Despite the overall praise, some reviewers were more critical. School Library Journal wrote that "[l]ike many series, the "Percy Jackson" books are beginning to show the strain of familiarity and repetition."[37] The BBC Children Newsround praised the novel for its smart ideas, but criticized it for the lack of flow, writing, "none of it will make sense if you haven't read any of the other books."[38] Nelda Brangwin of Library Media Connection wrote, "If this is the only book read in the series, readers may be confused by the storyline and profusion of mythological creatures. It reads well on its own if readers are familiar with mythology, but is best if the other three books are in the library collection."[39] The Battle of the Labyrinth was nominated for the 2010 Indian Paintbrush Book Award, earning the second position.[40] VOYA's highlighted review gave it a 4/5 for quality and 5/5 for popularity.[30]

The audiobook was also well received. AudioFile magazine praised the audiobook, raving, "Speedy introductions of familiar and new characters and previous plot summaries may briefly confuse a new listener, but fans will savor them," adding "Jesse Bernstein is on target whether he's narrating blow-by-blow accounts of Percy's sword fights or inventing cameos for various other characters: Hephaestus, who repairs a Toyota; an aged Daedalus; and Grover, Percy's slow-witted sidekick. Bernstein is just as skillful at wringing humor from the witty dialogue and from the contrasts between the modern and ancient worlds."[41] Booklist similarly praised Bernstein's familiarity with the series and ability to realistically portray its teenaged protagonists, commenting, "His portrayal of Percy stands out as he manages to sound just like a 15-year-old boy."[42] The work's review in The School Library Journal was also favorable, praising Bernstein for "[doing] a good job voicing Percy and his Cyclops half-brother" and "successfully [conveying] Annabeth's emotions". He attempts a number of different accents for the gods, demigods, and mortals in the story with varying levels of success."[43]

The sequel to The Battle of the Labyrinth is titled The Last Olympian and was released 5 May 2009. It is the final novel in the Percy Jackson and the Olympians series.[44] The Last Olympian was No. 1 on the USA Today bestseller list.[45]

• Rick Riordan Myth Master at publisher Penguin Books (UK)
• Rick Riordan at the Internet Speculative Fiction Database