After spending many years drifting between school and go-nowhere jobs, a young man is drawn back to the city where he grew up which is where his older sister, Grace, is living. Grace is a promising graduate student in psychophysics, she has a boyfriend who absolutely adores her and a small group of caring friends - friends that welcome "Little Brother" with open arms. Not long after arriving in the city it becomes clear that something is off with his sister. She flies into sudden rages, usually directed at her boyfriend who also happens to be her fellow researcher. When Grace disappears and her boyfriend shortly afterwards, the narrator makes a discovery while cleaning out their apartment - a box big enough to crawl inside, a lab rat, and a note that reads 'this is the only way back for us.' He then embarks on a quest to find out what happened to his sister, a pursuit that forces him to question both time and space.
Honestly, I'm not sure how to put in words what I felt about this book. It's complex, it's interesting and it will bend your mind into a pretzel. Not a whole lot happens in the book, but it was still a page-turner. The characters felt real. I especially loved Buddy and now want a pet rat. And I loved the setting- Toronto!