I have no idea how this is marketed as a college level text on the subject. It is just a 'high level' text suitable for non programmers interested in learning some of the terminology regarding Genetic Programming, with little or no practical information. This book was published in 1998, there are many free texts with far more practical information. I bought A Field Guide to Genetic Programming, which is also available as a free pdf, with this book, and the Field Guide is a far far better book on all counts.