By merging its two publishing divisions, the company will increase their share of the country’s $21 billion book market from 6 percent to 10 percent, a market ranging from obscure textbooks to mass-market paperbacks.
B. from 6 percent to 10 percent its share of the $21 billion book market in the country, which ranges
country 應該不可能ranges from obscure textbooks to mass-market paperbacks.
book market才可能吧?!
這是我的猜測,不知道是不是這樣

因為怎麻看,我還是覺得 to 10 percent from 6 percent的寫法很"乃右"...