"Pisanie książek to trudny proces."

Translation: Writing books is a difficult process.

[zosicz]

Writing books is the correct translation

[Jellei]

It is, I see exactly such a translation.

[zosicz]

Interesting. When I was taking the test the provided answer was 'writing a book'

[Jellei]

Interesting. There is an explanation to why we consider it 'acceptable' despite having a singular book, but it shouldn't be the main correct answer, so that's changed now.

[zosicz]

I think hersylia1234 is right.
>> Writing a book is a difficult process.
>> Writing books is a difficult job, way to make money etc.

Writing books (plural) assumes several processes.
Sorry for the confusion.

[hersylia1234]

to zdanie nie jest za bardzo poprawne logicznie. Bo ile pisanie ksiązki jest trudnym procesem, to pisanie książek może być: trudnym zawodem, trudnym sposobem na życie, niełatwym sposobem zarabiania pieniędzy itp.

[BartoszKod1]

"Writing books is a difficult/hard procedure" should be accepted as well

[alik1989]

I'd argue that process and procedure are substantially different. A procedure necessarily entails man-made instructions, whereas a process can also be something intuitive or even natural.

[fmarkom]

Pisać książki ia wrong?

[Jellei]

I personally think that it doesn't sound very good and I don't like it, but apparently it's still correct. Added.

But I'd recommend staying with the gerund form.