1. The sentence "I can not learn such a know-how with books what they are" is not grammatically correct. A clearer way to express the intended meaning would be:
"I cannot learn such know-how from books, as they are."
This clarifies that books, in their current form or nature, aren't enough to teach the know-how.
2. The sentence "I don't need any supernatural manifestation, just hard work and dedication. That's what it takes to be great" is grammatically correct. Your interpretation is close. A simplified way to restate it:
"To become great, all it takes is hard work and dedication."
Your understanding is accurate: being great requires hard work and dedication, not supernatural events.