The Medieval Warming Period

For those interested in the whole debate (however fraudulent it is)... here's some more ammo:
-Medieval Warm Period - Conservapedia

-Amazon.com: Unstoppable Global Warming: Every 1,500 Years, Updated and Expanded Edition (9780742551244): S. Fred Singer, Dennis

-Mann has a new paper: he apparently discovers the Medieval Warm Period « Watts Up With That?