My favorite books are...
Divergent by Veronica Roth [it's part of a trilogy, through the third one hasn't come out yet. The second is called Insurgent. These are my absolute favorite books, they have a good amount of action as well as romance and I love the plot.]
The Maze Runner trilogy by James Dashner. [The three in this trilogy are finished, and there is also a prequel to it. The Maze Runner, The Scorch Trials, and The Death Cure are the three trilogy ones, and the prequel is called The Kill Order. I love the trilogy, and I am still reading The Kill Order.]
Harry Potter by JK Rowling :D
The Host by Stephenie Meyer. [Now, a lot of people bash this book just because Meyer wrote it, but I actually found it to be a lot better than Twilight, it has an interesting plot [there is not even a mention of vampires anywhere, if you dislike Twilight] and there are good romance-ey parts to it.]
Milkweed and Wringer by Jerry Spinelli. [These are more middle school age kid books, but if you haven't read them they are still a good read for any age, they just are a little short if you are used to a longer book. I added them because Spinelli used to be my favorite author and those are my two favorite books by him. Milkweed is historical fiction, and it's the only historical fiction I have really ever liked xD]
Ender's Game by Orson Scott Card (I think). [This is a sci-fi book, so I don't know if you would read it. I really liked it, and I know there are other books and it's a series, but I haven't read them yet.]
There are more I can dig up from my mind if you'd like more :P