Ripple Effect (Time Thriller Trilogy) - Tapa blanda

"Using short chapters, tight writing, and cliff-hangers, the author pulls the reader along at breath-taking speed. Never once was I bogged down with too much teen angst or unnecessary details... the novel is a fun read and will appeal to science-fiction lovers. Parts of the book gave me pause and caused me to dwell on the 'unseen' and the idea of other dimensions. It's clean, wholesome entertainment for teens, especially for teen girls. Even if they aren't drawn to the usually male-dominated science-fiction themes, there are enough relationships, boyfriends, and best friends in Ripple Effect to keep them reading."--The Old Schoolhouse Magazine

Fifteen-year-old Elizabeth suddenly finds herself in a parallel world where she is called Sarah and is diagnosed as having amnesia, while the real Sarah has taken Elizabeth's place and is in a coma.