Unlike web services, books are meant for one thing and do the one thing well. Throughout thousands of years to this day, books are the best medium to transfer knowledge. Unlike an article, a book is a complete form, an object in and of itself, to which authors feel obliged to adhere from cover to cover and present their insight. In other words, knowledge, not mere information. Unlike an article, for a book demands substantial time from readers, the author cannot be neutral and objective about the content of the book, for that would be of no interest to readers. An author must declare their own opinion and stance on certain matters – subjectivity.