Complex sentence: In order to make sure this book reached the hands of the people who needed it most (mainly office workers) Peachpit created a campaign that gave away over 75,000 copies to companies and corporations who promised to give it to their employees.
Split into simpler sentences: In order to make sure this book reached the hands of the people who needed it most (mainly office workers) Peachpit created a campaign to give the book away. Peachpit gave away over 75,000 copies to companies and corporations who promised to give it to their employees.