Without a doubt, this is the worst edited publication I have ever read. While the information contained in this book is valuable, the editorial missteps and omissions are maddeningly distracting. Some examples include sentences that don't finish with periods, formulas with typos, poorly reproduced graphics, mathematical errors (in the examples!), objects omitted from sentences, and a contour map that requires a mirror to decipher (figure 3-5). As a teaching tool, this text inspires confussion and frustration rather than delivering clarity and instruction. A 4th edition might correct the many errors, but this edition is far too expensive for it's lack of professionalism.