Originally Posted by fizzypants
How about Harrington's Cash Games? I know they're mostly for ring games and not HU, but believe that they would be good for learning how to read and think about hands and teach some math/logic?
Yes, of course. All of his books (he also has a 6-Max book) provide these fundamentals, you'll just have to filter/adjust what you need for HU play. He provides many hand examples throught his books that consider his opponents playing styles and mathematics involved in a hand.
Other books you may also want to consider are;
How to read Hands at No-Limit Hold'em - Ed Miller
Playing the Player - Ed Miller
Hole Card confessions - Owen Gains (Qtip)
Poker Math that Matters - Owen Gaines
If you are really looking for advanced mathematics material, then the Mathematics of Poker is also considered by many to be the best in this area.