2. The Practice of the Presence of God by Brother Lawrence
Brother Lawrence "prayed to God among the pots and pans" as he worked in the kitchen of a Carmelite monastery in Paris (1611-1691). This is simple and profound. You will love it, and it goes along very nicely with "The Game with Minutes" that I just posted about.
Here is a link to the Librivox recording and a zip file of the book. It only takes 1 hour and 15 minutes to listen to, and I listened to it on one of my long walks. Made my whole day a lot brighter!
(If the link does not work, cut and paste it in your browser.)