TJ and the Time Stumblers Books in Order

Time travelers Tuna and Herby try to help TJ Finkelstein with a book report by asking its author to write it. Their shortcut sparks mounting trouble, forcing her to confront cheating while a classmate faces a similar test.

TJ tries to earn a Christmas gift for her unemployed father during the family's first holiday without her mother. Jobs complicated by Tuna and Herby's futuristic interference challenge her priorities and her understanding of what giving really means.

Seventh-grader TJ Finkelstein moves to Malibu and struggles to fit in, then discovers two students from the future are studying her. Their invisible presence and malfunctioning gadgets turn ordinary school problems into chaos while testing her values.

A futuristic pen broadcasts people's thoughts, then malfunctions until TJ's own ideas become real. Tuna and Herby's attempts to repair it deepen the chaos, forcing her to confront the consequences of angry thoughts and how she treats difficult people.

A malfunctioning device switches TJ Finkelstein's body with that of her rival, television star Hesper Breakahart. Tuna and Herby exploit the confusion to obtain fuel for their time machine, while TJ must confront forgiveness from an unfamiliar perspective.

Tuna and Herby's search for time-machine fuel accidentally takes TJ and much of her science class to Africa. Transformations and jungle dangers force her to begin exercising the leadership skills the visitors claim will shape her future.