Max Einstein:Saves the Future

This is the 3rd book in the Max Einstein series. See also article Max Einstein: Saves the Future.

Characters:
Max, Siobhan, Tisa, Ben, Klaus, Leo, Dr. Zimm, Charl, Isabl, Prof. Hinkle, Hana, Ms. Kaplan, Toma, Keeto, Annika, and more. (just named the main characters.)

Notes:

 * In this book, Lenard is now good and renamed Leo.
 * Instead of Dr. Zimm, there is a new villain introduced.
 * Features the debut of Leo and Professor Viktor Von Hinkle.
 * Readers find out that time travel is possible in this series. (not in real life)
 * Hana and Ms. Kaplan are found to be traitors to the CMI team.
 * Ben and Max's friendship is deepening.