Kadokawa Manga Science Series: Which is Stronger?! 4-Book Set, Bundle ① "Gorilla vs. Bear: A Battle of Brains and Power" ② "Crow vs. Bat: Dangerous Bird and Beast Air Battle" ③ "Cassowary vs. Kangaroo: The Ultimate Kick Showdown" ④ "Mantis vs. Scorpion: Who is the Strongest Assassin?!" List Price: ¥960 each There are no noticeable stains, but please consider purchasing only if you understand that these are used books.