Increased sales of printed books through Amazon.com.

Hi, I'm an independent bookseller selling professional books through Amazon.com.
I work in the dropshipping modality with my suppliers in countries such as the United Kingdom, Spain, Australia or Argentina.
I am the only supplier on Amazon.com and Amazon.com.mx (Mexico) of the books I publish. The books are in English or Spanish.
The books are from very important publishers and publishing groups. I have sold from Amazon.com to Mongolia, Singapore, Hong Kong, South Africa, South Korea, Japan, the US, and all of America.
My clients are lawyers, accountants, doctors, veterinarians.
I need to increase my sales.
King Regards,
Pablo R. Castellano
CLNZ Books – Castellanolibros.com
https://www.amazon.com/dp/0414105907?ref=myi_title_dp
https://www.amazon.com/dp/0414104951?ref=myi_title_dp
https://www.amazon.com/dp/9870343767?ref=myi_title_dp
https://www.amazon.com/dp/8412225449?ref=myi_title_dp