A. I like reading science fictions. - nope I like reading science fiction stories. I like reading science fiction books. B. I like reading science fiction. - fine By the way, if I want to introduce a book (written 20 years ago) to one of my friends, should I use present tense or past tense to describe the content of the book , thank you so much. . Generally, you read it (past) and it describes (present) as it still does. I read this a while back. It's about ....