It's not a spoiler to say that amnesia plays a big part in this story. I'm not a big fan of the amnesia trope (OK, I hate it) but it works in this case because the relationship between the H and h was so messed up that nothing but a wipe-out of it all and a reboot could be as efficient a fix in a 278-page book.
This is a very good romance, but it's my least favorite in Thomas's Fitzhugh family trilogy, probably because I found the two main characters (pre-amnesia) to be so exasperating. David Hillsborough, Viscount Hastings, has known and loved Helena Fitzhugh since she was 14 and has managed to spend all this time insulting, antagonizing, teasing, almost sexually harassing her and just in general being a boor and jerk around her. Granted, this relationship started when they were very young but one would think that in adulthood Hastings would figure out that this wasn't working. He was personable and charming around other people.
But Helena is no prize either. She's an opinionated, stubborn woman who has decided that a certain Andrew Martin is the love of her life. Certain they would marry, she is disappointed when he is persuaded by his mother to marry someone else, but that doesn't stop Helena from continuing a relationship with him. Supposedly Helena is an intelligent, take-charge, free-thinking businesswoman, but that makes her attraction to little weasel Andrew that much more puzzling.
So Helena has an accident and amnesia conveniently wipes out all memory of her life after about 14 years of age. This means no memory whatsoever of Hastings or her love Andrew. This gives Hastings the chance to start all over and charm instead of antagonize, something one wonders he didn't try in the first place. But stylistically, it makes for an interesting concept and this is an enjoyable read.
It wasn't as emotional a read for me as Fitz and Millie's story, but I enjoyed the use Thomas made of this miraculous amnesia and also the view into the depth of Hasting's character, a character that had initially seemed very superficial. In addition, post-accident Helena is a much more sympathetic character than pre-amnesia Helena ever was. Never thought amnesia could cause personality changes, even though I did love Overboard long ago, but Helena certainly improves in this story, even after her memory returns.
This is an entertaining book. I couldn't give it 5 stars because I was comparing it to Ravishing the Heiress (Berkley Sensation) which for me was a superior book because of the emotional wallop it carried. However, if one compares it to the normal run-of-the-mill HR being released it is definitely a 5-star book.