Mary and the Christian Life is one that our Catholic Women's book club read and enjoyed. We are a diverse group and every single one of us got a lot of value from this. You can take my word for it, and also read my words about it as part of my review is posted on the book page.
The Power of the Cross by Michael Dubruiel is one I haven't actually read. I call it terrific because I have never read anything of Dubruiel's that isn't. (For example, his How To Book of the Mass and How to Get the Most Out of the Eucharist are books I routinely browse through for answers and come away with a nugget of inspiration as well.) It's easy to see if I'm right. Download it and see for yourself.
It is really generous of Amy Welborn to make these available and I'm looking forward to reading (and rereading) them.