about 2 months writing on the side for each book.

Including the research and reading steps necesary to collect the data to aggregate in your books you write? You say you have read the 3 top books and several tech blogs <--- what are they? What main sources did you read to collect the data? Maybe you won't answer since all your business is based on that, finally :-).

i document more on these in twitter. :)

Any link please? Why avoiding to answer here directly?