"With a plot combining science and the supernatural, four kids are caught up in a dangerous plan concocted by the eccentric inventor Nikola Tesla"--Provided by publisher. Interest Level: 5-8 Reading Level: 6.0 ATOS Book Level: 6 AR Interest Level: MG AR Points: 11 AR Quiz: 164043EN Reading Counts Level: 5.6 Reading Counts Points: 15 Lexile Measure: 870.