Solid reading material.

<ul>
<li><a href="http://people.csail.mit.edu/custo/MITLockGuide.pdf">The MIT Guide to Lockpicking</a>, obviously
<li><a href="http://www.lockpicks.com/browseproducts/Secrets-of-Lockpicking.html">Secrets of Lockpicking</a> (<a href="http://www.google.com/search?q=%22Secrets+of+Lock+picking%22+%22by+steven+hampton%22+%22next+one+in+line.+raise+it+until+it+breaks%22&hl=en&safe=off&client=firefox-a&rls=org.mozilla:en-US:official&hs=FhN&filter=0">also available online</a>) (<a href="http://www.google.com/search?q=filetype:pdf+%22Secrets+of+Lock+picking%22+%22by+steven+hampton%22+%22next+one+in+line.+raise+it+until+it+breaks%22&hl=en&safe=off&client=firefox-a&rls=org.mozilla:en-US:official&hs=BiN&filter=0">PDF</a>)
<li><a href="http://ndemag.com/issues.html">Non-Destructive Entry magazine</a>
</ul>