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A Mutiny in Time (2012)
References to this work on external resources.
Wikipedia in English
Amazon.com Product Description (ISBN 0545386969, Hardcover)
Scholastic's next multi-platform mega-event begins here!
History is broken, and three kids must travel back in time to set it right!
When best friends Dak Smyth and Sera Froste stumble upon the secret of time travel -- a hand-held device known as the Infinity Ring -- they're swept up in a centuries-long secret war for the fate of mankind. Recruited by the Hystorians, a secret society that dates back to Aristotle, the kids learn that history has gone disastrously off course.
Now it's up to Dak, Sera, and teenage Hystorian-in-training Riq to travel back in time to fix the Great Breaks . . . and to save Dak's missing parents while they're at it. First stop: Spain, 1492, where a sailor named Christopher Columbus is about to be thrown overboard in a deadly mutiny!
(retrieved from Amazon Mon, 30 Sep 2013 13:37:04 -0400)
Time has gone wrong, and best friends Dak Smyth and Sera Froste, together with the young Hystorian Riq, must use the infinity ring to travel back to one of the Great Breaks--a mutiny on the Santa Marâia--to correct history and defeat the SQ.