Book excerpt: The eSourcing Capability Model for Client Organizations (eSCM-CL) [Hefley 2006a, 2006b] is a “best practices” capability model with two purposes: (1) to give client organizations guidance that will help them improve their capability across the sourcing life-cycle, and (2) to provide client organizations with an objective means of evaluating their sourcing capability. eSourcing relies on information and communication technologies as an integral part of the service delivery of a sourced service. Embedded within any service delivery is the client - service provider relationship. Client organizations serve as “informed customers” of these sourcing relationships, ensuring that the organization's sourcing activities are directed to meet end-user needs, provide value for money, and achieve the most beneficial outcomes. The ultimate success of the eSCM-CL model will be demonstrated when model adopters see fewer sourcing relationships that end due to deficiencies in service providers' performance, more effective and efficient management of service providers, better relationships between client organizations and their service providers, and increased business value arising from client organization's sourcing activities. The eSCM-CL was developed by a consortium led by Carnegie Mellon University's Information Technology Services Qualification Center (ITSqc). This work began in March 2003, with the eSCM-CL being released in September 2006. Data collection activities during the model development included an extensive review of the published literature; interviews with clients, service providers, and advisors; and multiple workshops with global participation. The literature review used to support the design of this model is represented in this Annotated Bibliography and is organized into two sections. The first section provides annotated entries that are ordered alphabetically by author's last name. In the second section, the entries are arranged in a topical bibliography. This topical bibliography is organized into sections addressing existing frameworks and each of the Capability Areas (CA) of the eSourcing Capability Model for Client Organizations (eSCM-CL).