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Bell's Breakthrough is written by Stacia Deutsch and published by Simon and Schuster. It's available with International Standard Book Number or ISBN identification 1442495367 (ISBN 10) and 9781442495364 (ISBN 13).
Abigail, Jacob, Zack, and Bo travel back in time to visit Alexander Graham Bell, and they urge him not to give up on his efforts to invent the telephone.