For pre-existing eBook buyers only.
After your eBook subscription has expired, you can extend for 6, 12, 18 or 24 months.
Only one extension is permitted. Further subscriptions will require the original eBook to be repurchased.
Extensions apply to the original eBook file only. Any new Editions that have been released in the meantime, will not be available for the extension.
After ordering, your order will be processed manually. A download link and access code will be sent to you by email. Please allow several hours for processing, as each eBook and access code is configured for you personally.