2002 - Mucus Attack the Icky Investigations of Ethan Flask and Professor Von Offel [Mad Science] (Paperback) ISBN-13: 9780439207256 ISBN-10: 0439207258 Genre: Children's Books 1 2002 - What a Blast the Explosive Escapades of Ethan Flask and Professor Von Offel (Paperback) ISBN-13: 9780439228565 ISBN-10: 0439228565 7 2001 - Foul Play Ethan Flask and Professor Von Offel's Sports Science Match [Mad Science] (Hardcover) ISBN-13: 9780439235792 ISBN-10: 0439235790 Genre: Children's Books ? 2001 - Clue Me in the Detective Work of Ethan Flask and Professor Von Offel [Mad Science #5] (Paperback) ISBN-13: 9780439228602 ISBN-10: 0439228603 Genre: Children's Books 2 Mucus Attack [Mad Science] (Paperback) ISBN-13: 9780439228589 ISBN-10: 0439228581 Genre: Children's Books 5 |