book sales

I need help with sales of my book. Book is available on Amazon ( As ebook and paperback ) , Kobo Apple Barnes&Noble Lulu Inktera Styxbooks etc. As well book is on more then 50 facebook groups with 400000 members ( what kind of members I dont know, its just a number ) Ad is on goodreads at the moment and was on facebook ( paid) but with very poor result. Name of book is "A history of the future" by Predrag Perisic ( price 8.7$) I put as a buddget 10 , and I be more then happy with 3 sales. After thet we can talk about any price for any period of time. Amazon link : https://www.amazon.com/History-Future-Predrag-Perisic-ebook/dp/B01MR8BUQ7/ref=la_B01N36EZSK_1_1_twi_kin_1?s=books&ie=UTF8&qid=1486156486&sr=1-1 Best regards Predrag Perisic