Modern books were made without prefaces and rapturous covers (1-7)

I believe the answer is:

e-readers

I'm a little stuck... Click here to teach me more about this clue!

'modern' is the definition.
I know nothing about this answer so I cannot judge whether this works.

'books were made without prefaces and rapturous covers' is the wordplay.
I cannot quite understand how this works, but
'books' could be 'readers' (reader is a kind of book) and 'readers' is found within the answer.
A single letter 'e' remains which might be clued in a way I don't understand.
This explanation may well be incorrect...

Can you help me to learn more?

I've seen this clue in the Sydney Morning Herald.

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