what is the conflict in secret zoo book 3?what obstacles are there

After many unbelievable adventures and with the help of various animals, they get inside of the hidden and definitely magic world, which is linked to the zoo. They learn that their local zoo is an unusual one, for it was created to help animals in every corner of the world. Unfortunately, since bigfeet got there too, the peaceful existence of the place was disturbed. As it turns out to be, it was they, who kidnapped Megan. After many struggles, the trio manages to save Noah’s sister and establish peace in the zoo over again. The adventure is finished and the kids happily return home.