James Patterson is quite an easy writer to read, and he has written a large range of books, so he might be worth looking into.
I would have a look at young adult books too. They are often ignored because of their age group, but are often very good books and you will see that a lot of readers on the forum really enjoy them as well written, but quite quick reads.
JK Rowling , Angie Sage, Cassandra Clare, Philip Pullman are just a few Young Adult authors I can recommend.
Good luck finding some books you enjoy.