The Sea of Monsters
by Rick Riordan
This is a sequel to the book The Lightning Thief. In this book, Percy figures out that his friend Grover is in trouble through a dream. Because it’s a dream, he’s not sure if it is real or not. In the end, it turns out that it was real and Percy and his friends need to save Grover. On the way, he teams up with both friends and enemies. I personally liked this book because it used a lot of humor to keep the reader interested and there were constant battles which also kept me interested.