The Time Skippers and the Lost Ruby

A homemade time machine. A lost royal ruby. A prophecy that could change the course of history forever.

Thirteen-year-old Libby is used to her zany grandmother, physicist Professor Evelyn Zamenhof, and her crazy antics. But lately, Libby noticed Evelyn has been acting stranger than usual, disappearing for long periods and working away in her lab. Then, one day, Libby receives a mysterious letter from her grandmother and finds out Evelyn is in trouble. Lots of trouble.

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