After finishing 41 percent of this book, I could take no more. I think I gave it more than a fair shake.
Honestly, I never did figure out what the author's goal was. S/he would interrupt the story to put in biographical notes (sometimes changing from third person to second person ... which made me wonder whether there was some cut-and-paste plagiarism going on). Her main character, Sally, describes herself as never having accomplished anything -- but during a weird time travel sequence involving Franklin Pierce, she's described as a prolific author.
The amount of time I spent mentally scratching my head and wondering what the hell was going on, as the author's pacing decisions kept ripping me out of the story, was far too great for me to enjoy reading this work.