How many books have you read

[Xinfu]

-How many books have you read?/How often do you read books?

Can I say: in reply:

-Not much.

and explain it inwardly by saying the underlying meaning is

-not much reading (=not many books)

[chileno]

-How many books have you read?/How often do you read books?

Can I say: in reply:

-Not much.

and explain it inwardly by saying the underlying meaning is

-not much reading (=not many books)

Yes. but the explanation is "haven't done much reading, lately"

[Rusty]

How many books have you read?
Not many. Many. Quite a lot/few.

How often do you read books?
Not often. A lot. Not enough/too much.

[Xinfu]

How many books have you read?
Not many. Many. Quite a lot/few.

How often do you read books?
Not often. A lot. Not enough/too much.

Thank you~

But is that conversation I quoted possible in daily life?

[Rusty]

The answer to "How many ..." should not be "Not much." "Not many" is correct.
The answer to "How often ..." may be "Not much." "Not many" is not correct.

[Xinfu]

Thank you~