At first, I had rather mixed feelings regarding this book. I realize, of course, that this was Nora Robert's first work and that it was published in 1981, so I didn't expect it to be very good.
Regarding the plot: I had few problems with the plot up until the marriage thing. It came kind of completely out of nowhere. I mean, Uncle Paddy saw them kiss once in a frenzy of happiness over Majesty having won a very important race and suddenly it was his dearest wish in life for Dee and Travis to get married. That literally became his deathwish within the space of about a day. I realize that this novel was written for a rather conservative line of romance novels and that the author had to find some way or other to marry the protagonists off to each other before she could show them having sex, but an arranged marriage? Solely to satisfy the whim of an uncle whom they already said is NOT going to die, but is going to recover fully from his heart attack? Plus, the whole reason Paddy wants this in the first place is so Dee will be "taken care of" once he's gone. I fail to see how Travis couldn't have "taken care of" Dee without forcing her into a marriage (he literally bullies her into marrying him, gripping her shoulders so hard that she goes "beyond physical pain" and telling her that if she cares about her uncle at all, she'll do it) she doesn't want. I mean, she already had a job at Royal Meadows. The only way I could see this being plausible is if she needed to marry someone in order to stay in the country. But Roberts never even brings up the issue of possible deportation as a consequence of NOT marrying Travis, so I really don't see why they needed to get married other than to please the publishers so they wouldn't have to take a chance on trying to sell a book involving premarital sex. Which I suppose makes a bit more sense when you consider that it was 1981, but the entire plotline felt so contrived and flat to me.
Regarding the hero: I didn't much care for Travis. I wonder if perhaps I would have liked him more had I read this book (or been alive) when it was first published. With the right social context, his character may have been more likeable, but as such I simply found him rude, controlling, and disrespectful of Dee's wishes and thoughts. He often incites her anger because he thinks it's funny, but then when she tries to call him out on this, he "crushe[s] her mouth with his, cutting off a heated retort." He more than once compares her to a horse. He literally sees her as another one of his animals, needing to be tamed to his will. This is even evident in the name of the book, Irish Thoroughbred. Dee is not a person, she's just another horse. He saves her from a rape attempt in the stables, which is perfectly fine, as Dee is described (over and over and over again, we get it already, Nora Roberts) as a very small person and the large stablehand who assaults her quickly overpowers her. I don't find fault with him helping out of a horrible situation. I have a problem with the fact that he goads her with it. Dee flirts with another man after a race and Travis, in a fit of jealousy, chases him off and then makes fun of Dee for needing help throwing off her attempted rapist from a few weeks before. He apologizes immediately, as he should, but when she retorts that he shouldn't have said it in the first place, he gets angry, calls her a "green-eyed witch", threatens to beat her (this is not the only time he does this- once he even threatens to kill her), and then kisses her without her consent. I was not alive in 1981, but I don't understand how at any point in time this kind of behavior could be considered romantic. It's not romantic; it's creepy, invasive, and abusive. Near the end of the book, Dee thinks to herself that SHE'S been treating HIM terribly and should apologize, classic behavior of an abuse victim. At the end, he explains away his behavior as being an act of love, admitting that he's basically been stalking her ("I didn't dare let you out of my sight; someone might have come along and snatched you away") lest, Heaven forbid, she find herself attracted to someone else. He tells Dee that he's been manipulating her life and work schedule around his desire for her. Wonderful behavior from her BOSS, totally not sexual harassment at all.
Regarding the heroine: I love that Dee has an untameable temper. While I did find some of her dialogue and such to be very stereotypical (fiery redhead Catholic virgin Irishwoman), I thought her anger was almost always justified and that her temper added extra depth to an otherwise kind of Mary Sue-ish character. However, I wasn't a fan of how quickly Dee bends to the will of all the men around her. I understand that Paddy is the only family she has left (disproved by the sequel book, however, in which she suddenly has a multitude of cousins back in Ireland), and that he is very important to her. But the idea that she doesn't want to report her attempted rape because it might upset Uncle Paddy seems outlandish to me. There are a multitude of reasons why people don't report it when they've been raped/nearly raped, but not wanting to upset your uncle seems odd. This may have made more sense had Roberts gone into it more and explained that she was in shock or that she was using this as an excuse to cover up her fear/trauma or literally anything, but Dee is almost completely unaffected by the incident.
So, all in all, I liked some aspects of the novel. I liked Dee for the most part, although I think my opinion of her would have been increased had the author gone into her character a bit more. But from what I've read of her 1980s novels (I must admit, her more contemporary heroes are far better), Roberts kind of had a thing for borderline abusive, narcissistic, oh-it's-totally-okay-'cause-he's-rich-and-hot heroes. I'm getting tired of it, really.