Title: Summer of Yesterday
Author: Gaby Tiana
Publisher: Simon Pulse
Publication Date: June 2014
Synopsis from Goodreads
Back to the Future meets Fast Times at Ridgemont High when Haley’s summer vacation takes a turn for the retro in this totally rad romantic fantasy.
Summer officially sucks. Thanks to a stupid seizure she had a few months earlier, Haley’s stuck going on vacation with her dad and his new family to Disney’s Fort Wilderness instead of enjoying the last session of summer camp back home with her friends. Fort Wilderness holds lots of childhood memories for her father, but surely nothing for Haley. But then a new seizure triggers something she’s never before experienced—time travel—and she ends up in River Country, the campground’s long-abandoned water park, during its heyday.
The year? 1982.
And there—with its amusing fashion, “oldies” music, and primitive technology—she runs into familiar faces: teenage Dad and Mom before they’d even met. Somehow, Haley must find her way back to the twenty-first century before her present-day parents anguish over her disappearance, a difficult feat now that she’s met Jason, one of the park’s summer residents and employees, who takes the strangely dressed stowaway under his wing.
Seizures aside, Haley’s used to controlling her life, and she has no idea how to deal with this dilemma. How can she be falling for a boy whose future she can’t share?