About the Book: The third book in the bestselling Dungeon Crawler Carl LitRPG series follows Carl and Princess Donut as they navigate the deadly Iron Tangle, a labyrinthine subway system filled with dangerous puzzles, rival contestants, and relentless enemies. With bounties on their heads and trust in short supply, they must forge uneasy alliances and uncover the secrets hidden within a mysterious book to survive the fourth dungeon level. Packed with thrilling action, dark humor, strategic gameplay, and immersive RPG mechanics, this science fiction fantasy adventure is a must-read for LitRPG fans.