I used this book to study for the Concrete Inspector certification exam. The book has been well-used, with notes and markings throughout. Please be aware of this. This book explains 792 problems with color photos to deepen understanding. - Title: Concrete Inspector 2023 Edition - Features: Concrete in Color Photos - Number of Problems: 792 problems, categorized and explained - Published: 2023 - Release Date: December 30, 2022 Thank you for looking.