Mining Explained by Northern Miner has a new edition out (2007), available on Amazon now.

Others to buy (THIS list should keep you busy for awhile, not to mention set you back a few thousand shares of Tyhee...)

Junior Mining Investor by Corcoran

Chemistry of Gold Extraction by Marsden and House

Insider's Guide to the Mining Sector by Coulson

Mining Valuation Handbook by Rudenno

Valuing Mining Companies by Kernot

Introductory Mining Engineering by Hartman

Mining Economics and Strategy by Runge

Intro to Mineral Exploration by Moon

Management of Mineral Resources by Camus

Will's Mineral Processing Technology

Geology of Ore Deposits by Guilbert

SME Mining Engineering Handbook

Open Pit Mine Planning and Design

Mining Engineering Analysis

Mineral Processing Plant Design and Control

And, if there are still any oil investors out there,

...The Non-Technical Guide to Petroleum Geology.

Just to name a few.

Best,

CD