This is going to sound rather out of place in this forum but never the less I consider it a very! good book (if you like this sort of thing) I highly recomend Stephen Hawking's A Brief History Of Time. There are some excellent theories and fastenating insights by Hawking in this book.
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"The beginning of eternity.
The end of time and space.
The start of every end,
And the end of every place."