Can anyone recommend some good books on mermaid mythology?

I'm 12 and I absolutely love mermaids. Can anyone recommend me any good books? Like actual fact books. I already have The Book of Mermaids by Patricia Saxton and Mermaid Wisdom: Enrich Your Life with Insights from the Deep by Brenda Rosen. Please don't say Magical Mermaids and Water Creatures by D.J. Conway; I borrowed it from the library and I really didn't like it.