Helicon Books cloud (EPUBCLOUD) is used by bookstores to send books directly to customer's reading application.
This websites describs Helicon Books reading application and the cloud.
The application can be installed on any Android device (supporting Android 4.2 and above) or any Apple iOS device (supporting iOS 10 and above).
To download and install:
Books can also be read online using the following link: https://epubcloud.heliconbooks.com