https://www.amazon.com/Travel-Glasses-Call-Search-Everywhen-ebook/dp/B00K6A0964
$0.99 (regularly $2.99) 9/28/2016 - 10/8/2016!
Valcas uses an altered pair of sunglasses to pull Calla through time and space. After breaking her trust, a chase begins—through a series of parallel worlds, where rules are broken and travelers become Lost.
Amazon synopsis:
2016 IAN OUTSTANDING YOUNG ADULT WINNER
2016 NEW YORK BOOK FESTIVAL YOUNG ADULT RUNNER-UP
2016 READERS' FAVORITE HONORABLE MENTION IN YA MYSTERY
Calla Winston’s mobile devices sit in a corner of her room, covered in dust. Weeks ago, she shared photos and laughs with her best online friend. Now, after having felt the sting of betrayal, she prefers being hidden and friendless. She equates privacy with security and technology with pain.
Then she meets Valcas, an otherworldly time traveler who traverses time and space with a pair of altered sunglasses. When an ethereal being knocks Calla to the ground near her family’s lakeside cottage, Valcas uses the Travel Glasses to help her escape. He offers his further protection in exchange for a promise. Intrigued by Valcas and the possibility of time travel, Calla accepts. That is until she learns that his search for her was no mere coincidence.
Calla sets off on her own, taking the Travel Glasses with her. Torn between searching for her estranged father and reuniting with the rest of her family, she tracks down the inventor of the Travel Glasses in hopes of discovering more about Valcas’ past and motivations. The Travel Glasses take Calla’s mistrust of technology to all new levels. But without them, she’ll never make it back home. With Valcas hot on her trail, Calla hopes to find what she’s looking for before he catches up.
The Call to Search Everywhen is a serial series of novel-length installments. Travel Glasses is YA fantasy filled with metafiction and other literary twistiness. It's a thought-provoking narrative about trust, relationships, reality and illusion.