As I am buying my son his first microscope at age 11, I purchased 5 books to help this investment have the documentation to use it to its fullest. I find this book very good, but a little advanced for my son at this time. While it explains many tools to use with the microscope, it does not show how to make them yourself. I very much like the links it provides for future referance as my son's knowledge and experience progresses. In my son's case, it will take much parental help with this book to fully understand and gain from this book.