This book, and software, was written by a professor at the University of South Carolina. He first introduced it in the 1980's. He has been cashing in on it ever since by attempting to update it every few years. He requires all of his students to buy it, and use it. It is poorly written, in need of clearer explanations, and in my opinion is nothing more than a rehashed introductory accounting textbook. What a ripoff! If you want to learn corporate finance don't buy this book. I'm watching you Leroy.