advance copy
US /ədˈvæns ˈkɑːp.i/
UK /ədˈvæns ˈkɑːp.i/
1.
a copy of a book, film, or other product that is provided before its official release, typically for review or promotional purposes
:
•
The publisher sent an advance copy of the novel to several literary critics.
•
We received an advance copy of the new software for testing.