There is a difference. The second sentence refers to a book that had already been a topic of conversation. Eg. This is THE book I was telling you about. The first sentence implies the listener is hearing about it for the first time.
9 november 2017
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The first one sounds better
9 november 2017
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Heb je je antwoorden nog steeds niet gevonden?
Schrijf je vragen op en laat de moedertaalsprekers je helpen!