Val, I think you've misinterpreted what she meant. I think she's saying that she wants to lift 4 days a week and alternate with rest days (which sounds good, OP.)
Lots of people, myself included, love the New Rules books--the New Rules of Lifting for Women or the New Rules of Lifting for Life. Those are books with full 6 month programs and really good explanations of why the programs operate the way they do. I love them.
Beyond that, read around in the Weight Training sub-forum. Lots of people have asked this question before you.
You'll find lots of good info.