Books in The Zack Files series

When Zack goes to a store to buy a baseball card, he finds himself face-to-face with his future son who has traveled back in time

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Zack is forced to share his body with a bossy, British queen who has been dead for almost one hundred years.

After Zack buys a large, green, weird-looking egg at a flea market, the housekeeper forgets his warning and microwaves it, and it hatches into a very strange reptilian creature--and begins to grow an an amazing rate.

When magic enables Zack's eighty-eight-year-old grandmother to become a terrific batter, she ends up playing in a Chicago White Sox baseball game.

When Zack uses a magic box from Tibet to produce a duplicate of himself, he finds that he has created more problems than he has solved

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A few days before his school's Halloween dance, Zack meets a girl who seems to be already wearing her costume.

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After a class trip to see the Neanderthals, Zach gets locked into the Rosencrantz Museum on the night of the new moon, the one time of the month when the prehistoric people and animals in the exhibits come to life.

When Zack disturbs a mummy case in his neighbor's storage area, he befriends the mummy, Icky--even though he doesn't usually get on with older kids--and the two get into adventures together.

After she eats his homework, ten-year-old Zack suspects that his substitute teacher Mrs. Wolfowitz is a werewolf and uncovers her bizarre secret.