General books around 1200-1800

I just got Amerature's mind, and reading the first few pages my game improved! lol thanks for the suggestion. 

Hays Winning Chess Tactics for Juniors

Chess School 1a and 1b

Averbakh's Essential Chess Endings (nice and short)

Simple Chess by Michael Stean

500 Master Games of Chess by Tartakower and Dumont

Here's an update after reading some of the material suggested in this post: 

Jeremy Silman's - How to reassess your chess & the amateurs mind, both excellent positional books that I would highly recommend. they are pretty enjoyable and funny reads, and very enlightening on strategic chess and provides good principles. 

CT art (4.0) -  thought not a book, it's a very practical tactics program that will develop your calculation and maybe visualization. the puzzles presented are very well thought out complicated combinations with variations.  

Chessimo - it's also a program, and instead uses pattern recognition, developing your intuition.the program comes with strategy, tactics, endgames, and openings puzzles. the content is massive and is less work than fun. 

Dan Heisman - Back to basics: Chess tactics a great book on tactical recognition in your everyday chess games. in my games I've found myself winning with the very tactical positions presented in the book.

Andrew Solitis - Not been able to read many of his books, but seem a very experienced and dedicated chess teacher with some worthy chess wisdom. 

Other authors I'll read are nunn, chernev, and reinfeld