YOU SAID:

William Shakespeare is the best-selling fiction author of all time (estimated 4 billion copies sold).

INTO JAPANESE

William Shakespeareは、史上最も売れ行きの良いフィクション作家です（推定40億部が販売されています）。

BACK INTO ENGLISH

William Shakespeare is the best-selling fiction writer in history (an estimated 4 billion copies are on sale).

INTO JAPANESE

William Shakespeareは史上最も売れ行きの良いフィクション作家です（推定40億部が販売中です）。

BACK INTO ENGLISH

William Shakespeare is the best-selling fiction writer in history (an estimated 4 billion copies are on sale).