[외서]
The Adventures of Otto Collector's Set (Boxed Set): See Otto; See Pip Point; Swing, Otto, Swing!; See Santa Nap; Ride, Otto, Ride!; Go, Otto, Go!
[ Paperback ]
[외서]
The Adventures of Otto and Zip Collection (Boxed Set): See Zip Zap; Poof! a Bot!; Come In, Zip!; See Pip Flap; Look Out! a Storm!; For Otto
[ Paperback ]