Categories ELT Who is the best-selling EFL author ever? Post author By perezparedes Post date 18th July 2012 Well, I should’ve known better as I bought his books in the late 70’s and early 80’s myself: L.G. Alexander sold something close to 5 million books at that time. He passed away in 2002. Read on. Tweet Related ← What Happens When Scientists Get It Wrong? → Who is the best-selling EFL author ever?