I just finished reading Sarah. I thought it was an easy read and it kept my interest the whole way. I helped make these characters of the Bible "real".
One thing I loved was the the author's description of Sarah's aches and pains carrying a baby and giving birth as an OLD woman! (Just reading the account in Genesis doesn't make you stop and think how hard that must have been for her in her advanced age.)
I'm much younger than Sarah was at the time Isaac was born, but can empathize in that the ol' body and joints just aren't what they used to be.