question: How did the book 'Eternal Valkyrie' by Erick Gustafsson impact his popularity?
answer: 'Eternal Valkyrie' was a turning point in Gustafsson's career. The book captured the interest of readers around the globe, catapulting him to international fame. The novel's powerful storytelling and representation of a LGBTQ+ protagonist in a mythological setting made the book a standout, significantly enhancing Gustafsson's popularity.