The Maze of Bones

I am reading the Maze of Bones and will describe the main characters of the book.

The two main characters are Dan and Amy. Amy knows a lot and is good at finding clues. She has done a report on almost everything. Even though she is smart, she often gets frozen in terror and panics in a dangerous situation. Her brother Dan is not as smart but is good with number sense and remembers pass codes and other things involving numbers. He  is a very quick thinker and reacts fast. Often saves Amy.