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If you are looking for something general, In Search of Shroedinger's Cat is a good read in terms of Quantum Theory.

hm I am actually going through those. I just did chapter 1, >.< I'm doing chapter 2 tomorrow. I find that if you don't already know what phasors are you might have a bit of trouble in the beginning. Well I'm starting from Vol. 3, I think he covers those in Vol. 2 or Vol. 1, we covered those in our ece class. So as you said Layra-chan, it might be a little too technical for Adm.Flames.

Hyperspace can take you there. It's a scientific odyssey through Parallel
Universes, Time Warps, and the 10ith Dimension. rofl plus its fun to read

The Feynman lectures are really meant for students of undergraduate physics. It's been a while since I looked at them, at least vol 1-2, but I remember them being very wordy without much calculus. I think that the majority of readers with a moderate comfort level in differential-Integral calculus should be able to breeze through them.

This isn't physics related, but if you want some good, but challenging and sophisticated, reading without any pre-reqs try Godel,Escher,Bach

Seconded.
This is the book that got me into physics in the first place. John Gribbin is an amazing author. I'm actually currently reading "Schrodinger's Kittens and the Search for Reality" by the same author.

Also, for General Awesomeness, Michio Kaku's "Physics of the Impossible" is a good read.

Gribbin -also- has some good books for cosmology ("In Search of the Big Bang", "Origins of the Future: Ten Questions for the Next Ten Years"), and there've been some absolutely fascinating articles recently in Scientific American.

Pet peeve, so I'm going to sound a bit rude, but I would actually recommend against reading The Elegant Universe. It's a rather biased view of string theory that makes claims as to string theory's predictive abilities that have not been substantiated. It also glosses over several major problems that string theory has, usually involving miscellaneous infinities in bad places.
Furthermore, it's entirely nontechnical, to the point of almost being false. String theory is a highly mathematical theory and trying to understand it without the requisite mathematical background is like trying to explain the digestive tract without any concept of what organs are. Brian Greene, trying to write something that regular people can read, leaves out basically every single detail, important or not. I can guarantee that you actually have no idea what string theory entails.

for cosmology:

"Reinventing Gravity" by John W. Moffat...

interestingly enough, parts of his theory may be validated or disproved once the LHC gets going...