I personally don't like cats very much, but when I started reading this series, it pulled me into their world. Kid, 10 years old January 10, The Warriors, I would recommend to people who like adventure, magic and a bit of violence.
Personally, I believe this series is meant for kids 11 and under, or anyone that can handle bloody and gore-like scenes throughout the books. Personalize Common Sense for your family. For example, Moth Flight's Vision, the currently most recent book, kind of forgot about Clear Sky's redemption, and turned him from an anti-hero back to an anti-villain.
Examplecat died from illness a few months ago, the end. Otherwise, this is a great series, and I highly recommend it to tweens who can handle it. When I was in 5th grade Someone recommended this book to me.