This is an e-Book, a new form of “Navigable Book” or Brook * that can be read sequentially or whim-sically, moving around with the subject matter. As such, it has a complex organizational framework, but the reader is not compelled to follow page numbers, the reader can make sidetrips and return at any time.                                                                                                                                                                                                                                                            A Browser-Book, a “Brook”...