How to Disappear Completely and Never Be Found by Sara Nickerson (2003)

Paperback in Very Good (VG) condition.  Most stories start at the beginning, but I really can't say I know where that is. Is it a falling-down mansion on a small island in the Pacific Northwest, or in the navy blue pickup truck making its way to that mansion? Does it start on a sunny day this year, or on a sunny day twenty years before? Is it with me, or with a young boy who, a long, long time ago, believed he was turning into a rat? I guess the only thing I really do know is where it started for me--in that navy blue pickup heading toward a place I didn't even know existed. A place that had already changed my life.