Currently re-reading TOP, and HEAP. Is Doyle I a subset of Doyle II? Buy II, but not I? Should one or both be my next read?

I have a feeling that there is a definite risk of becoming too 'poker book smart', and therefore suffer from not knowing how to put principles and techniques into real application. As an alternative to more reading, I was thinking it would be a better investment of time to spend that time playing thereby gaining concrete, hands-on experience.

Thoughts/Suggestions/Recommendations?