Time Between Us by Tamara Ireland Stone

Anna lives in 1995 Evanston, IL while Bennett primarily lives in present day San Francisco although he can travel back and forth in time at will.  Bennett likes taking his sister with him into the past to 90’s alternative concerts.  It’s during one of these concerts that Bennett ‘falls’ back to his present 2012, leaving his sister behind in Illinois.  He must travel back and stay for an extended period of time in order to find his sister and bring her home.  This is when he meets Anna, the first person he trusts enough to share his secret with outside his immediate family.  Anna has longed to travel period.  Her dad bought her a map of the world so she can track her travels with red push pins.  She has one push pin and it’s in Michigan.  Lucky for Anna her new boyfriend can take her exotic places but at a cost.