As a graduation gift to myself, I recently ordered some books off amazon, which have presently arrived. I think I now I have thorough collection of exercise books designed to improve a pianists technique. I'm pretty excited to have all of these now, and to work on little by little over the years.

Mastering Piano Technique, -Seymour Fink
Brahms, 51 Exercises for the Piano
Czerny, 40 Daily Exercises
Hanon, The Virtuoso Pianist
Czerny, The School of Velocity
Dohnanyi, Essential Finger Exercises
Beringer, Daily Technical Exercises
I. Philipp, Exercises for Independence of the Fingers
Vardan Ovsepian, Mirror Exercises

Yeah, this is probably overkill.