>Michio Kaku NO
>Brian Greene NO
These two are speculative at best, and Kaku hits the bong. Seriously.
>Richard Feynman VERY YES,
Get the Lectures On Physics from the second hand book store, because you will be putting notes in the margin. Some things may be dated [especially his insistence on the mystery of QM as there isn't any such thing; it's just probability calculus with complex numbers]
And I found this online, how wonderful is that: