All non-basic books are used and have writing in them. The basic books are almost unused. There are also sticky notes attached. I also have other reference books available, so bulk purchases are welcome. Please feel free to comment. Please only purchase if you understand that these are used items and have been stored by a private individual. Please read the profile before purchasing. - Title: Common Test Past Questions Research Physics Physics Basics 2024 - Title: Common Test Past Questions Research Chemistry Chemistry Basics 2024 - Contents: Problem sets for physics and chemistry, with answers. - Number of pages: The number of questions in each book is listed. Physics contains 17 sets, and Chemistry contains 21 sets.