To be honest, both sentences sounds fine to me. They simply convey slightly different nuances.Originally Posted by Help Wanted
(B) implies that she will read more than one book, while (A) implies that she will read only one. (A), however, is more common because it speaks more generally about her reading, instead of giving it a quantity.
If you would like to use (B), however, I think it is more common to hear the word books with an adjective describing quantity.
[...] and read some books.
[...] and read a few books.
[...] and read a book or two.
I'd like to hear the opinions of others.