Data access is an integral part of any software application. Entity Framework provides a model-based system that makes data access effortless for developers by freeing you from writing similar data access code for all of your domain models.
Mastering Entity Framework provides you with a range of options when developing a data-oriented application. You'll get started by managing the database relationships as Entity relationships and perform domain modeling using Entity Framework. You will then explore how you can reuse data access layer code such as stored procedures and table-valued functions, and perform various typical activities such as validations and error handling. You'll learn how to retrieve data by querying the Entity Data Model and understand how to use LINQ to Entities and Entity SQL to query the Entity Data Model.
Comments about oreilly Mastering Entity Framework:
This is a nice effort but far from comprehensive. The examples and tutorials need to be fleshed out more with more detailed logic and examples. I am comparing this with Pluralsight's online course in entity framework. I would say that this book gets a C while Pluralsight's course gets an A.
Bottom Line No, I would not recommend this to a friend