From the World of Percy Jackson: The Sun and the Star

Nico, the son of Hades, and his boyfriend Will, the son of Apollo, travel to Tartarus, the deepest, darkest part of the Underworld as they attempt to rescue an old friend.

Rick Riordan (he/him), 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, including Percy Jackson and the Olympians, The Heroes of Olympus, and the Trials of Apollo, all based on Greek and Roman mythology. He lives in Boston, Massachusetts with his wife and two sons. Follow his news on RickRiordan.com. Mark Oshiro (they/them) is the author of the young adult books Anger Is a Gift, winner of the 2019 Schneider Family Book Award, and Each of Us A Desert, an NPR Best Book of 2020. Their middle grade books include The Insiders, a Publishers Weekly Best Book of the Year; and You Only Live Once, David Bravo. When not writing, they are trying to achieve their life goal of petting every dog in the world. Mark is based in Atlanta, Georgia and their website is MarkOshiro.com.