All are new curriculum editions. I did not take the class for Basic Physics, so it is unused. Basic Biology was used for only one year. For Chemistry, I used a different reference book, so this is also almost unused. However, there are some markings for test ranges and mock exams, so there is writing in them. Please refrain from purchasing if you are sensitive about this. I am also selling other school supplies, so discounts are available for combined purchases <(_ _)> Thank you for your consideration m(_ _)m - Book Title: Basic Biology - Book Title: Basic Physics - Book Title: Basic Chemistry - Book Title: 2024 Seminar Basic Chemistry + Problem Set - Book Title: Neopal Note Basic Physics - Book Title: Basic Chemistry - Book Title: Basic Physics - Book Title: Basic Chemistry