This is a book I just finished reading. Note that if and when you look for this book, you want the “Fully Revised and Updated Second Edition,” not the outdated first edition. The cover price is $20; Amazon price is $13.36, with other online booksellers offering similar savings. If you are an IT person or work in any other field that deals heavily with the Internet or technology, this book is well worth $13.36. Heck, it’s worth $20. In fact, the section on LinkedIn, alone, is worth that much.