por Alberts, Bruce [autor] | Bray, Dennis [autor] | Hopkin, Karen [autor] | Johnson, Alexander [autor] | Lewis, Julian [autor] | Raff, Martin [autor] | Roberts, Keith [autor] | Walter, Peter [autor] | Ferrán, José Luis [traductor] | Tzal, Karina [traductor] | Patrone, Ubaldo [traductor].
por Langman, Jan [autor] | Sadler, Thomas W [editor] | Leland, Jill [ilustrador] | Ferrán, José Luis Eduardo [traductor].