1. 02. English Fiction Attack of the ninja frogs / by Vernon, Ursula. Publication: New York : Dial Books for Young Readers, 2010 . 203 p. : 19 cm. Date:2010 Availability: Copies available: (1), Actions:
2. 02. English Fiction Night of the Ninjas / by Osborne, Mary Pope. Publication: New York : Random House, 1995 . 68 p. : , "A Stepping Stone book." 19 cm. Date:1995 Availability: Copies available: (1), Actions: