The content of the book is quite good but the presentation of symbols, equations and the graphics are of a very low standard.<br>Figure 1.3a is missing, 1.3b is not identified.<br>Graphic symbols inside the text are not separated from the text with any space, consequently they appear only as a dirty smudge between the words, totally illegible. It is extraordinary frustrating, the purpose of writing a book is to read it, to make it illegible is just pathetic.<br>The operators of the differential equations in (5.3) are totally illegible, I had to search for other references to find out what it supposed to look like.<br>The intent of the book is good, that is what I want as a reference, but I am totally frustrated by the extremely poor presentation.<br>A seperate page with a list of all notations used in the book would also be very helpful.