QuickArrow has made a great library of 35 must read PS whitepapers available on their site. The collection includes some papers from TPSA director Thomas Lah, PSVillage advisory board member Jeanne Urich, Charles Green from Trusted Advisor Associates, and more.

There are great papers on The Changing PS Model, services marketing, services maturity, and KPIs/metrics. Thanks to QuickArrow for providing such a great resource, and to PSVillage for bringing it to my attention.