What I liked about this book is that the characters seemed very realistic. My favorite was Sam because he was very sarcastic and humorous. Even though Sam is a cat that talks, in the story it seemed normal and fun. The story was very intruiging and had a lot twists, turns and suprises. I also think the author did a good job on having Sam's ability to talk and be a detective seem normal. One thing I did not like about the book is that the author didn't really introduce Henry very well at the start. I felt that it took a while to get to know Henry.