Apple Books Volume Content Service
The Volume Content Service (VCS) allows educational institutions and businesses to purchase books in volume and distribute the books to their users through redeemable codes and via user assignment.
VCS is available in the following countries:
Australia, Austria, Belgium, Brazil, Canada, Czech Republic, Denmark, Finland, France, Greece, Ireland, Italy, Japan, Luxembourg, Mexico, Netherlands, New Zealand, Norway, Poland, Portugal, Spain, Sweden, Switzerland, United Kingdom, and United States
Your books are automatically opted in to the program after you complete your agreement. To remove your book from the VCS, go to My Books, select your book, click Rights and Pricing, and deselect VPP-Enabled.