Looking for tips: NOVEL reading

When i was still an elementary student.... I used to read all kinds of novel but what i really love is mystery and detective stuff... I could reading helps a lot

But as a grow older... I shifted to shoujo manga and now yaoi manga (not that it is a bad thing) and all together....
I lost all my interest to read novels and i am stuck now with my problem..

I bought many books in booksale (store) which cost very cheap and was just guessing if it is good or bad... As long as it has good cover and game but i have lost my interest to try read again..

What should i do to love them again??