Heroes of Olympus, The, Book Four: House of Hades, The-(New Cover)

Rick Riordan, dubbed "storyteller of the gods" by Publishers Weekly, is the author of five #1 New York Times best-selling middle grade series with millions of copies sold throughout the world: Percy Jackson and the Olympians, The Heroes of Olympus, and the Trials of Apollo, based on Greek and Roman mythology; the Kane Chronicles, based on Ancient Egyptian mythology; and Magnus Chase and the Gods of Asgard, based on Norse mythology. Rick collaborated with illustrator John Rocco on two #1 New York Times best-selling collections of Greek myths for the whole family: Percy Jackson's Greek Gods and Percy Jackson's Greek Heroes. Rick is also the publisher of an imprint at Disney-Hyperion, Rick Riordan Presents, dedicated to finding other authors of highly entertaining fiction based on world cultures and mythologies. He lives in Boston, Massachusetts with his wife and two sons. Follow him on Twitter at @camphalfblood.

Nilah Magruder is a writer and artist based in Los Angeles, California. From her early days she developed an eternal love for three things: nature, books, and animation. She has written and storyboarded for studios such as Disney and DreamWorks. She also illustrates children's books, including the Dactyl Hill Squad series by Daniel Jose Older. Nilah is the author-illustrator of M.L.K., a middle grade graphic novel that won the Dwayne McDuffie Award for Diversity, and How to Find a Fox, a picture book. She has published short fiction in the anthology All Out, in Fireside magazine, and for Marvel Comics. When she's not working, Nilah is watching movies, growing herbs, roller-skating, and fighting her cat for control of her desk chair. Follow her on Twitter at @nilaffle.