Force.com enterprise architecture : architect and deliver packaged Force.com applications that cater to enterprise business needs / Andrew Fawcett ; foreword by Joshua Birk

This book is for advanced Force.com developers and architects who need to understand the Salesforce platform from the perspective of enterprise-level requirements. You should have an existing understanding of Apex and Visualforce. Those familiar with other enterprise software ecosystems will also find this book ideal as they adopt Force.com.