The Thing About Jellyfish is a mysterious book that you will never want to put down. It starts out with a twelve year old girl named Suzy watching jellyfish at a aquarium. A few days ago her best friend had died swimming in the ocean while on a vacation. When Suzy is told this she realizes it can not be true, her best friend had been a great swimmer, so she sets out to find what happened to her best friend. She believes it could have only been one thing, a jellyfish. She does as much as she can to prove what happened to her best friend, but no one believes her. If you love mysteries and like not knowing what is going to happen, this book is for you. It is a great read for teens and children and I totally recommend reading it.