I have to thank you guys for reminding me of The Blithedale Romance as I've been looking through other titles about that era, and came across this biography of the Peabody Sisters. The book opens with the marriage of Sophia Peabody and Nathaniel Hawthorne, signaling a new age in romance. Their Diary of a Marriage was on exhibit not so long ago at the Morgan Library and Museum. The book received great reviews when it came out in 2005. For some reason I remember it coming up in the old NYTimes forums, but can't sure about that.