There's a weird little thing that niggles at me about Harlequin Mills&Boons, which is the use of the word 'female' where 'woman' would have been better, IMO. Did 'woman' get over-used and have to be retired, or something? I have no idea whether it's an editorial decision or whether authors have just all decided to do it for themselves, because it's pretty consistent across the HM&B books I've read, this strange, almost clinical 'female' where the word 'woman' would have done. To the point where it even crops up in dialogue, though I'm sure noone on earth ever says "...because you're a female" or "us females", etc.
Anyway, I think it's strange, and it bothers me, and sometimes it even takes me out of the story completely.
But back to this book - if you don't find ward/guardian sexual dynamics creepy, and you're prepared not to be disgusted at the lengths of effort and even deception our heroine will go to in order to capture her guardian's attention, and you don't want too much angsting about before the sexy bits (or even afterwards, to be frank) this book should deliver.
My ex-library Australian edition also had a short story by Cathy Williams at the back, which I liked better than the novel itself, although it still had some questionable elements - hard-as-nails secretary goes on a work trip to a tropical island with her movie-star sexy boss, who puts the moves on her.