To get the ball rolling... I will answer this question this evening
For people aware & unaware I think it would be a great way to introduce the group, resources for fundamental knowledge & concepts.
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Clark, This is one of the popular questions we have on our community when someone new to the field come in and ask where they should start.
We point them all to the list we have gathered which is now one of the most comprehensive list for quant finance
My type is "An introduction to the mathematics of financial derivatives" by Salih N. Neftci. Though it's definitely harder to digest than Hull.
One that I found via google that seems promising (for beginners though) is.
John C. Hull's "Options, Futures, and Other Derivatives" is the mostly widely recognized introductory book for derivatives valuation.
This may be too basic a book for what you're hungering for. In preparation for the Financial Engineering actuarial exam, I'm studying from Derivative Markets by McDonald.
It's very technical, but gives a great introduction to the mathematics behind pricing options and even goes into depth on Brownian motion.
Check it out here: http://amzn.to/g3QOES.
I like the following book (though have only very briefly skimmed it):