Complex sentence: In both 2007 and 2008, it was the best selling book of the year in Spain, and it has also reached number two on the "New York Times" bestseller list, as well as in the UK, Ireland, and Australia.
Split into simpler sentences: In both 2007 and 2008, it was the best selling book of the year in Spain. It has also reached number two on the "New York Times" bestseller list, as well as in the UK, Ireland, and Australia.