fix: correting typos and grammar structure

[brunagil]

I corrected some typos and changed some words and grammar. The goal was to create a more concise and engaging text. I used to work as a proof reader so it's not gonna hurt if I make the work of the next one easier :) Feel free to change what it's better and reach out if you have any questions.

[getify]

These books were already published a year and a half ago, after having been fully content-edited and proof-edited. Substantial re-edits of the books are no longer on the table. Thank you.