A lot of people seem to write text books on engineering. But my question is.....why bother?. I am willing to bet you $20 bucks that if you go to a section on say, 'thermodynamics' and take 5 books at random written at the same level, you are going to find nearly identical content in all of them. In fact, they are probably even in nearly the same order. So why do people insist on re-writing one book after another? I say, we only have two books, that everyone revises and re-reads. The reason I say two is because you can usually prove things more than one way. But this way, you get two books of quality that can be a 'bible', if you will....and not the 50-100 books that regurgitate the same garbage. More quality, less quantity.... Ok, now you may call me ku-ray-zay! I think if your going to write a book and only repeat what other people have already done, you have no business writing books. Dont believe me, open a book by Hibbeler and then get Beer-Johnston. They are the same book. How is that not plagiarism?