My rating refers to the quality of the item delivered, not the content of the textbook itself, read on for details.I ordered this book through Amazon.com, LLC hoping to avoid the many low quality counterfeit textbooks shipped by many third party sellers. When I opened the box, the packing slip said "Principles of Fluid Mechanics, [Hardcover]" but the textbook was just what I wanted to avoid. The cover was flimsy paper, the entire content of the textbook was printed in black and white on what looked like extremely cheap recycled paper.I thought it had to be an error, so I called Amazon and requested an exchange. Lo and behold, the replacement item was the exact same low quality item. I ended up paying $50 LESS to get an actual hardcover from a third party seller on the site. I hope Amazon.com, LLC will look into their supplier and fix the issue soon. Until then, they are charging $150 for a product that is NOT as described.