Why do one find some book very deep, other - empty, third - nonsensical? Why, re-reading a book, you each time find out something not noticed before? Why does someone understand all tints of sense, the concealed sees between lines, hears music of words, their taste, color and smell, feels, and someone remains deaf to them? Why someone from the first time perceives maintenance of textbook, and someone needs repeatedly him to explain?To tune in to the "wave" of author and understand anymore, ability to read actively is required. Exactly for this purpose Mortimer Адлер, American philosopher, editor and teacher, right through life devoting to that, to teach people to love and understand books (afterwards he led editorial advice of encyclopaedia "Britannica"), wrote the book.A book needs to those, who wants to develop flairs to many-sided to perception of text, and also those, who would like to write books so that to be it is correct to понятым, and those, who engages in editorial work.