Cost over $30 after tax, worth less than $3. As you can see by the accompanying photo, this book not even as thick as my TV remote. There is absolutely nothing in this book that most high school students don't already know.
I've spent less than $30 for books that are over 5" thick, and that contained more information than you could digest in 6 months.
VERY disappointed. The advertising copy for this product is all puffery.