Unfortunately we are currently experiencing issue with ebook downloads and apologise for the inconvenience. We hope to have the problem resolved within the next 48 hours, however if you require your e-book please contact us quoting your order no and email address on Customerservice@springernature.com and we will supply your eBook manually.
As soon as the issue is resolved the purchased eBook will be available to you in your eBookshelf. You will then be able to download it there anytime.
Please find more information on your eBookshelf here: Digital content / eBookshelf instructions.