Arlo, Mrs. Ogg, and the Dinosaur Zoo (Library Binding)
Things aren't looking good for Class X. With another teacher running away screaming (literally), Arlo wonders how long the new substitute teacher will survive. When Mrs. Ogg takes the class to the zoo, Arlo realizes it's up to him to keep everyone in line. What Mrs. Ogg fails to mention is that this is no ordinary zoo . . .