Booksnap from : The Fun They Had By Isaac Asimov
The children are used to a world where everything is learnt through a computer
These adjectives tell us that the book is really old
This sentence uses irony, or a double or hidden meaning. The book is presented as something strange and unusual, but it is actually something we are familiar with, because we live in a different time to the children in the story. The difference between what they see and understand and what we see and understand creates irony.