Thank you for looking! Stored in a dark place. All are in clean condition with no noticeable stains, but only the bottom 3 books have faint indentations from writing. Please check again if you are sensitive to such details. ☆ Please check my profile before purchasing. - Title: Doraemon World Flags Encyclopedia Doraemon Japanese Language Fun Strategy: 100 Four-Character Idioms & Proverbs Dictionary (Revised Edition) - Easy-to-Understand Honorifics Doraemon Social Studies Fun Strategy: Understanding Japanese History 1 (Jomon Period ~ Muromachi Period) - Understanding Japanese History 2 (Sengoku Period ~ Heian Period) Doraemon Science Fun Strategy: Understanding Astronomy (Earth, Moon, Sun, and the Movement of Stars) - Quantity: 7 books set ▶︎ 5 books set - Publisher: Shogakukan - Content: Knowledge related to social studies