First off, we suggest two books by a priest of our own day, Fr. Jacque Philippe.
Time for God and
Thirsting for Prayer are both short, affordable, easy-to-read books that will give you new insights, as well as correct false ideas that might have developed about God and prayer. We heartily recommend everything by this author, and these two are a good place to start. For your "Grow in Prayer" basket, they'll set a good foundation.