【Science Comic Survival Series: Volumes 41-84, 44 Books! Second Half Set! With Bonus!】 ★ To complete "Survival in the Himalayas," volumes no. 40 and no. 41 have been swapped. ★ Please take this opportunity to fully stimulate your child's scientific curiosity! ● There are some scratches and minor wear on the covers, and signs of use on the edges, which are typical of used children's books. However, this is a set of books selected for their suitability as introductory books that children can read without worry, and the text is perfectly readable. ● Each book is carefully disinfected with alcohol and thoroughly cleaned, then completely waterproofed and shipped safely and anonymously. ● Each item is cleaned with care and attention. Please feel the difference in the cover's texture. ◎ For picture books and children's books, see → #imperial'sChildrensBooks