This is the Sigma series Chemistry Basics textbook and Sigma Basic Problem Collection Chemistry Basics, published by Bun'eido. Brand new, unused. The "Kore de Wakaru Chemistry Basics" textbook explains the content of Chemistry Basics in an easy-to-understand manner. It is intended to be used as a reference book. The "Sigma Basic Problem Collection Chemistry Basics" is a practice problem set. 《Notes》 ✅ There may be slight variations in the actual product compared to the model photos. Please understand that this does not affect the product itself. ✅ Please note that the texture and color may appear different on your device than the actual product. ✅ We will ship within 1-2 days. Shipping to Hokkaido, Okinawa, and remote islands requires an additional fee of 2000 yen. Please understand. ✅ We also accept comments and price negotiations, so please feel free to contact us! #ChemistryBasics #SigmaSeries #UniversityEntranceExam #HighSchoolChemistry #ChemistryBasicsReferenceBook #ChemistryBasicsMaterials #ChemistryBasicsProblemSet