Promising but disappointing hangs

The intro announced a highly informative content, I was eager to read it but in the end, it appears very disappointing. An entire chapter on methods of calculation it's just too, too much. And finally not so constructive as an example. The other chapters are not better, in fact we see little autonomous learning, besides an example the translator - yes I ca put on the account of a bad translation - passed learning to read / write for a miracle. It is far from the title and the natural learning transformed by the enthusiasm I thought discover more intellectualized way here.