what music theory book should I read next?

I have gone through about half of a book on harmony, and am almost
done with Fux's gradus, and I am not really sure of the best books to
read next, the books I have access to are as far as I know are these.

Taneyev - counterpoint book
Schenker - Harmony, free composition, counterpoint
Hindemith - Vols 1 and 2 on composition
schoenberg - harmony
rameau - harmony
piston - harmony
richard sorce - music theory(this is the book I read through half of
already, it has gone through most of what I've seen in other books on
harmony and voice leading)

Anyway, I am worried about learning something that is wrong etc so I
would really appreciate input, the 2 that I am most considering are
Mann's on fugue and Taneyevs book on counterpoint which seems a lot
more advanced than fux's.
oh and Mann's book on fugues is also available