I used to be a classic workaholic and after seeing how little work and career really mean when you reach the end of your life I put a new emphasis on things I believe count more. These things include: family friends being part of a community and appreciating the little joys of the average day.
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.