Complex sentence: Besides teaching history courses at the university, Brands has written extensively, having authored twenty-four books, co-authored three others with T. H. Breen, and produced numerous articles that have been featured in newspapers and magazines.
Split into simpler sentences: Besides teaching history courses at the university, Brands has written extensively. He has authored twenty-four books, co-authored three others with T. H. Breen, and produced numerous articles that have been featured in newspapers and magazines.