Entity Framework 4 in Action is an example-rich tutorial that helps .NET
developers learn and master the subject. It begins by explaining object / relational mapping and then shows how you can easily transition to EF from ADO.NET. Through numerous focused examples and two larger case studies, the book unfolds the EF story in a clear, easy-to-follow style. Infrastructure and inner workings of EF are discussed when you need them to understand a particular feature.