At Amazon the book does not have a reader's review yet. Anyone here want to comment whether it is worth its money. On their website I read the first few sections and I like the exposition of the mathematical principles. It is closer to the style of a math lesson than a physics lesson, meaning the math is mostly explicit and complete and not the physics style shortcut math found in many books. Is this style continued in the later chapters? Other comments about the book? Thanks, Harald.