These books have been stored in a non-smoking home and are free of odors and writing. The Cliffs Review is new and has not been used. The study guide has mild shelf wear. The ion flashcards have not been taken out of the back of the book . Both  have answer keys. The study guide's key has detailed step by step answers to the odd problems.

I used this study guide as a review for my students and found it to be very helpful

Thank you