content: As a student chemical engineer I found the book somewhat helpful, but not really. My teacher taught the same material but in a different way and his way seemed much simpler than the books. I returned the book at the end of the semester because none of my classes 'needed' the book. Surprise! I now need the book and amazon apparently takes 1 to 3 months to ship this book...aka I'll get the book at the end of the semester.