Question:  The Blood of Olympus is a young adult novel written by an American author whose books have been translated into how many languages?
Context: Winger (2013) is a young adult fiction novel written by American author Andrew Smith.  Set in the prestigious boarding school, Pine Mountain, Oregon, the story follows fourteen-year-old Ryan Dean West as he recounts past events that he has experienced in his journey of maturation.  "Winger" is Andrew Smith's sixth young adult novel, and has garnered mostly favorable reviews. Linda Crew (born 1951) is an American author based in Oregon.  Her writing ranges from children's books such as the "Nekomah Creek" series, to young adult Historical novels with crossover appeal for older readers such as "Brides of Eden: A True Story Imagined," "Fire on the Wind," and "A Heart for Any Fate: Westward to Oregon 1845".  "Ordinary Miracles", published by William Morrow in 1993, is an adult novel.  Her young adult novel "Children of the River" has won several awards.  She graduated with a Bachelor of Arts in journalism from the University of Oregon, Phi Beta Kappa.  She lives in Corvallis with her husband. The Blood of Olympus is a young adult novel written by American author Rick Riordan and is the fifth and final book in "The Heroes of Olympus" series.  It was released on October 7, 2014.  The seven demigods of the Prophecy of Seven—Percy Jackson, Annabeth Chase, Jason Grace, Leo Valdez, Piper McLean, Hazel Levesque, and Frank Zhang—go on their final adventure to defeat Gaea while Nico di Angelo, Reyna Avila Ramírez-Arellano, and Coach Gleeson Hedge attempt to bring the Athena Parthenos to Camp Half-Blood in order to prevent a war between the Roman and Greek demigods.  The chapters are written from the perspectives of Jason, Piper, Leo, Reyna, and Nico, making it the first time in the series that someone other than one of the seven demigods of the prophecy is the viewpoint character.  It is the second time that Percy appears without being a viewpoint character (first being in "The Lost Hero"). Daniel Manus Pinkwater (born November 15, 1941) is an American author of children's books and "Young Adult" fiction.  Well-known books include "Lizard Music", "The Snarkout Boys and the Avocado of Death", "Fat Men from Space", "Borgel", and the picture book "The Big Orange Splot".  He has also published an adult novel, "The Afterlife Diet", and essay collections derived from his talks on National Public Radio.  Though many of his most well-known books are considered humorous young adult fiction, he has written in various genres and for various audiences, and his published works range in style from picture books to adult fiction. Gallows Hill (1997) is a supernatural thriller novel for young adults by Lois Duncan.  It was her first and only young adult novel written after the death of her daughter.  It was written eight years after her previous young adult novel, "Don't Look Behind You".  It is about a girl who moves to a small town with a secret. Fangirl is a 2013 contemporary young adult novel written by Rainbow Rowell.  "Fangirl's" publication follows Rowell's previous young adult novel published earlier in 2013, "Eleanor & Park". Richard Russell Riordan Jr. ( ; born June 5, 1964), better known as Rick Riordan, is an American author.  He is known for writing the "Percy Jackson & the Olympians" series, about a twelve-year-old boy who discovers he is a son of Poseidon.  His books have been translated into 42 languages and sold more than 30 million copies in the US.  Twentieth Century Fox has adapted the first two books of his Percy Jackson series as part of a series of films.  His books have spawned related media, such as graphic novels and short story collections. Young adult fiction or young adult literature (YA) is fiction published for readers in their youth.  The age range for young adult fiction is subjective.  Some sources claim it ranges from ages 12–18, while authors and readers of "young teen novels" often define it as written for those aged 15 to the early 20s.  The terms young adult novel, juvenile novel, teenage fiction, young adult book, etc., refer to the works in this category. Michael Laser (born September 14, 1954) is an American novelist, short story writer, and children’s book author.  His novels for adults include "My Impending Death" (2015), "Hidden Away" (2013), "Dark & Light: A Love Story" (2007) and "Old Buddy Old Pal" (1999).  His children’s books include "The Rain," a picture book (1997), "6-321", a middle-grade novel (2001), "Cheater," a young adult novel (2008), and "The Watermelon", a young adult novel (2012).  He has published widely in literary magazines, including The Massachusetts Review and New England Review. Jeffrey A. Krames is an American, award-winning, best-selling author whose books have been translated into more than 26 languages around the globe.  He was the former editor-in-chief of Portfolio, the business book imprint of The Penguin Group [the second largest trade publisher in the world].  He is the former Vice President and head of the trade division at McGraw-Hill, one of the United States' largest publishing firms.  Mr. Krames has appeared on CNN, CNN International, Fox News, CNBC, BBC, PBS, MSNBC, Fox Business, CBS, NBC, plus several other stations.  His work has been published in The New York Times, Newsweek, Business Week, Time Magazine, The Wall Street Journal, The Chicago Tribune, L.A. Times, The Economist, Publisher's Weekly plus many more newspapers in the U.S., Asia, South America and Europe.
Answer: 42