One of the worst books I've ever come across. Plenty of printing errors, incorrect graphs with wrong aspect ratio which makes it next to impossible to solve the problem accurately. Also, there are too many wrong answers and vague solutions.
Worst book in kindle format. It supports only mobile kindle app. It does not support kindle book reader. Also it looks like pdf which is scanned from the book. It is just waste of money. You can not even get the money back.