Entity Framework 6 - Knowledge Base (KB)

Is there a non-commercial alternative to Z.EntityFramework.Extensions?

Entity Framework can be very slow on mass insert/update/delete operations. Even the often suggested tweaks to turn off AutoDetectChanges and/or ValidateOnSaveEnabled does not always help....I have come across the Z.EntityFramework.Extensions on NuGet, but...

How can I insert a row in my database that has a foreign key without adding a row in the linked table?

I created an Entity Model with Database First on my project. In my database i have two table´s. One for books and one for the author´s. The books have a foreign key on the authortable. And every time I want to add a new book, im adding a new author, eve...