Adobe faced criticism in October, 2014 for tracking the ebooks users download and store on their devices. This information was being transmitted to Adobe in plain text (not encrypted), vulnerable to interception by other parties.
This issue only affected users using Adobe Digital Editions on Windows or Mac computers.
For more information about this update, please see this article from PC World.
Adobe Digital Editions is free software that allows you to:
Manage your eBooks
Transfer eBooks to Mobile Devices
Installing Digital Editions on your computer allows you to read eBooks offline on your computer or mobile device.
To download, go to Adobe Digital Editions to download and follow the onscreen prompts.
Create and use your personal Adobe ID to authorize your computer and reading devices. You'll also need an Adobe ID to read eBooks on iPad and Android Tablets.
TIP: Make your Adobe ID easy to remember. Record and store your login information where you can access it later.
To transfer eBooks between devices, see the ADE Help page.
For more information on:
Authorization and Activation go to ADE's Help page.
Authorizing a Kobo eReader go to Kobo's ADE page.
Note: Adobe Digital Editions is not designed for school computers.
Install Adobe Digital Editions software on your home computer or laptop, or submit a Help Desk ticket.
You can find a list of devices supported by ADE here.
There is also additional information on the Other Devices tab of this guide.