Kindle is, of course, not the only e-book outside there but it is still quite dominant.

Kindle is, of course, not the only e-book out there, but it is still quite dominant. (in this case 'out there' is the correct collocation)

Current figures exhibit that Kindle hold more than 70% of the market share, being its preponderance even more accused in the United States.

Current figures *show* that Kindle hold more than 70% of the market share, (The rest of the sentence doesn't quite make sense).

At that time it seemed that the days of the textbooks were numbered and it was only a question of time that physical books vanished on the market.

that physical books would vanish from the market. (collocation = vanish from)

Millennials, who have been blamed for destroying several industries, are in fact, responsible for the current good sale figures featured by physical books.

sales figures

They buy more physical book than previous generations and they affirm that they read more on paper than on screens.

They buy more physical books than previous generations, and they affirm that they read more on paper than on screens.

Kindle is, of course, not the only e-book outside there but it is still quite dominant.

Current figures exhibitshow that Kindle holds more than 70% of the market share, being its preponderance even more accused in the United States.

Exhibit works, but show is a little more common. :)

I remember watching sales figures in 2010, showing a vertiginous rise.

Love the vocabulary! I'm a native English speaker and this is the first time I've seen "vertiginous"!

At that time, it seemed that the days of the textbooks were numbered, and it was only a questionmatter of time thatbefore physical books vanished on the market.

The trend soon reachedhit a ceiling and t. The evolution has been very different compared to the one of music or videos, areas where the physical counterparts were almost reduced to cult objects in the hands of fervent collectors.

I think it was 2007 when Amazon putintroduced the first version of the Kindle ton the market.

It sounds better when you use the verb introduce. The verb to put is usually used when referring to objects that you pick up or move

Kindle is, of course, not the only e-book outside there, but it is still quite dominant.

The 'it is' is not incorrect, but it is unnecessary.

Current figures exhibit/demonstrate/show that Kindle holds more than 70% of the market share, beingwith its preponderance even more accused/prevalence even greater in the United States.

Accused doesn't make sense in this context

At that time it seemed that the days of the textbooks were numbered, and it was only a question of time thatbefore physical books vanished onfrom the market.

The trend soon reached a ceiling and the evolution has been very different compared to the onehat of music or videos, areas where thwhose physical counterparts were almost reduced to cult objects in the hands of fervent collectors.

Millennials, who have been blamed for destroying several industries, are in fact, responsible for the current goods sales figures featured by physical books.

They buy more physical books than previous generations and they affirm that they read more on paper than on screens.