"We are writing a book."

Translation: Nous écrivons un livre.

[Angelina924769]

They should have speaking exercises so you learn how to use the accent of the French

[Angelina924769]

Me being American not knowing how to say it is hard

[HeadPlug]

They used to have them

[dbucar]

shouldn't the object of the sentence be used with "definite" form?
i deduced that rule from the previous examples

[Sitesurf]

To use a "definite" article, you need a "definite" noun:

• We write the book of our life = nous écrivons le livre de notre vie, where "of our life"/"de notre vie" define the book.

Otherwise, it is about a book, one book, we have nothing more to define it, so in English and in French, the indefinite article is required.