market a 30 page ebook for healthcare professionals

I am looking for a freelancer to help me market a 30 page specialist ebook I recently published for healthcare professionals. The target audience for this ebook are dietitians, GPs and gastroenterologists, and the main goal of this project is to increase sales. I would like to focus my marketing efforts primarily on social media channels such as Twitter, Facebook, and LinkedIn to reach the largest amount of people within this audience, although I am open to other suggestions about the best way to market it. Experienced freelancers in this topic are highly encouraged to apply.