"The Eternaut" is the first book in the El Eternauta series by Héctor Germán Oesterheld, published by Fantagraphics Books in 2019. This hardcover book is written in English and features a captivating storyline that follows the adventures of a space-travelling superhero, El Eternaut. Fans of science fiction and action-packed narratives will enjoy this gripping tale that showcases the unique world-building and storytelling style of Oesterheld and his co-author, Francisco Solano López.