Books are a collection of words that form a unified narrative, and printed on paper. These kind of objects are very alive today, and will continue to exist when you’ll be having grandchildren. They are one of the best inventions.
Ebooks are a collection of words that too form a unified narrative but are not printed on paper. Instead they are distributed electronically in various formats for vast amount of devices. Soon you’d be able to read ebooks on those wearable smart watches. If that doesn’t damage your eyes, nothing will. Apart from that, they are one of the best innovations. They are here for the benefit. It’s up to the reader to take full advantage of the technology for their benefit and love of reading.