Clockwork Crazy — Elle Strauss

The stress created by Casey's recent split from Nate causes her to trip back in time in a haphazard manner, and not always to the same time! Sometimes she's in 1929 Boston getting more entangled than ever with the mishaps of her new and not-so-helpful friends, and at other times she's back in 1775 trying to make sure the colonists still win the war of Independence! 

Will the craziness ever stop? And will she and Nate work out things in time for graduation? 

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The Clockwise Collection is light science fiction (historical) time travel with a nice splash of young adult romance!