The phrase "edition copy" refers to a specific version or printing of a book, magazine, or other publication. It is used to distinguish between different printings or releases of the same material.
So those of you who didn't get a chance to support the project but who are perhaps interested in getting hold of a second edition copy of this book — stand by! (angelahighland.com)
How do you determine how many collector edition copies to print? (kickstarter.com)