You can have a spiritual awakening and discover a new side of you at any age. And best of all love can happen at any age. Life can just start to get exciting when you're in your 40s and 50s. You have to believe that.
The great book for you is the book that has the most to say to you at the moment when you are reading. I do not mean the book that is most instructive but the book that feeds your spirit. And that depends on your age your experience your psychological and spiritual need.