Math practice book sellers for North America, Europe and Australia

Greetings, we have published math practice books in North America, Europe, and Australia under the brand name "Kite's math practice books". I need help in selling these books. The books are available on Amazon. There are two versions- ebooks and paperback. If I like the work and if there is some selling of the books due to this work, I can extend it based on the performance and sales achieved by this exercise.