Can iBooks be viewed on multiple devices? Or do I need to buy a separate copy for the iPad and the home computer?

Yes, iBooks can be viewed on multiple devices, if and only if they’re logged into the same account. For example, an iBook can be viewed on any Apple device provided the devices are both linked with the same Apple ID. If you have multiple students with separate IDs, they will both need individual access codes. iBooks will not work at all on your PC or Android device.  Please contact their support team at 1-800-275-2273.