Actually, the trend started during Lent when I gave up listening to the news on the radio. During that time I listened to CD's on spiritual topics.
Then on two long car trips to New Hampshire and Virginia this spring, I got audio books (one with my son-so we listened to one of my all-time favorites: Treasure Island. It was good to 'read' it again after some many decades.)
More recently I have listened to 2 Louis L'Amour novels about Barnabas Sacket, the patriarch of his Sacket novels.
I wish I could find Allen Eckert books (The Frontiersmen and Court-martial of Daniel Boone) audio, but am settling for actually reading them.
Just now I am listening to Animal, Vegetable, Miracle by Barbara Kingsolver. Some good information so far, but she is a bit preachy and probably not a great choice for younger ears as she seems to linger on comparisons between human and plant reproduction quite a bit, I think for humor value-they are only functionally related.
I really need to add in some good spiritual audio here. I listened to Chesterton's Everlasting Man on tape on a long trip many years ago.
What I have found is that when listening to the news, my mind wanders and I sometimes ponder many things. When listening to a book, I tend to stay focussed on the book. My imagination is more static. Sometimes that is good, sometimes bad.
Oremus pro invicem!