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It seems like a regular field trip to a natural history museum - until Zack gets locked inside for the night and discovers what really goes on in those display cases when no one is watching.

Zack ...

Zack's new substitute teacher seems kind of odd. And she is rather hairy. And get this, her name is Mrs. Wolfowitz! But is she really a werewolf? Or just one very weird lady who happens to like the taste of ...

Zack's classmate Andrew Clancy is always bragging. Everyone knows he's a big liar. But suddenly, Andrew is having trouble hiding the fact that he isn't telling the truth, and every time he tells another whop...

When Zack and Spencer get the late-night munchies at a sleepover, they curb their hunger with some freeze-dried food that Zack got at the Air & Space Museum. After devouring freeze-dried ice cream and pizza,...

Zack wants to adopt a kitten from the local animal shelter. But what he takeshome instead is a scruffy old tomcat who not only talks, but claims to be thereincarnation of Zack's long-departed Great-Grandpa J...

Zack is nervous about the fifth-grade Halloween dance. He doesn't know how to dance and he doesn't have a date! When Zack meets Prudence, a beautiful girl who speaks with a funny accent and dresses in old-fa...

Zack is sent off into a parallel universe where hilarious adventures occur after he opens his medicine cabinet one morning, only to discover his double staring back at him.

Zack is a normal 10-ye...

When a flubbed electricity experiment in science class gives Zack a shock, he suddenly finds out he has a talent he never had before--Zack can now read other people's minds!

Zack is a normal 10-y...

Zack isn't thrilled about having to get a tooth pulled, but a trip to the orthodontist proves a lot hairier than he ever expected. Nice old Dr. Silver has been replaced by the fang-toothed Dr. Jekyll, a mout...

While in Hawaii, Zack falls under the curse of a very grouchy volcano goddess.

Zack is a normal 10-year-old boy with a knack for getting into weird situations such as a dentists who recommends sw...

Zack finds out that although clones can be helpful with homework, chores and bullies, they may be his biggest problem yet!

Zack is a normal 10-year-old boy with a knack for getting into weird situ...

When Zack accidentally drinks the invisible ink that is one of Spencer's experiments, he worries about missing his only chance to get his picture in the paper, if the new flavor he and Spencer invented wins ...

In Central Park, Zack and his dad encounter an alien who has lost his spaceship, which has been towed because it was illegally parked.

Zack is a normal 10-year-old boy with a knack for getting in...

While on a class picnic in Central Park, ten-year-old Zack gets a chance to study ants close up and personal when he uses way too much of a classmate's diet powder and shrinks to their size.

Zack...

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