Dungeon Crawler Carl 系列的第三集，把主角 Carl 和貓咪搭檔丟進一座錯綜複雜的地鐵迷宮。路線糾纏到有些讀者看得一頭霧水，關於列車與車站的冗長說明也拖慢了前半部，到頭來並沒有看起來那麼重要。熬過這一段之後，動作場面與幽默感都回來了，結局也很有力，遊戲背後更大的故事也逐漸展開。適合有耐心的忠實讀者。

值得一提《地城爬行者卡爾》第三集（2021年）把卡爾和會說話的貓「甜甜圈公主」帶到第四層「鐵纏結」：一團大陸般大小的地鐵線路和車站，列車就是地圖，在錯誤的站下車是大多數爬行者的死法。書名指的是卡爾拿到的道具，一本由先前的爬行者寫下、教人如何破壞地城規則的指南。麥特・丁尼曼這個系列從自費出版的LitRPG起家：地球被拆毀，倖存者被送進十八層地城，當作銀河直播節目；到了這一集，地城外的節目政治和裡面的怪物一樣重要。別從這本開始；這套書只有按順序讀才成立。

BookRank 編輯部的看法，依據讀者的評分與意見撰寫，不影響評分，也不影響排名。

關於本書

Welcome to the Iron Tangle! Carl and his ex-girlfriend’s cat, Princess Donut, have to team up with other contestants not just to survive, but to solve a deadly puzzle in this third, mind-twisting novel in the Dungeon Crawler Carl series—now with bonus material exclusive to this print edition. Earth has been transformed into the set of the galaxy’s most watched game show: Dungeon Crawler World, a nightmarish, multilevel, video game–like dungeon filled with traps, monsters, and mind-bending puzzles. Carl and Donut have survived so far, but this fourth level is unlike anything they could imagine. The Iron Tangle: an impossibly complicated subway system tied together into a knot of trains of all kinds, from classic steam engines to sleek modern cars. Up is down. Down is up. Close is far. The cars are filled with monsters, the railway stations aren’t always what they seem, and the exit is perpetually just a few stops away. The top ten list is populated, and Carl and Donut have made it. But that popularity comes with a price. They each now have a bounty on their head. They must work with other crawlers to solve the puzzle of the floor, but how can they do that when they don’t know who to trust? The secret to unraveling it all may be hidden in the pages of a seemingly useless book. Welcome, Crawlers. Welcome to the fourth floor of the dungeon. Includes part three of the exclusive bonus story “Backstage at the Pineapple Cabaret.”