I have been convinced by all the love shown for Lisa Kleypas that she's worth reading. It's also helpful that she has so many books that there's always at least one that's available immediately from the library when I get the urge for some romance.
Dreaming of You (1994) by Lisa Kleypas involves a man and a woman who fall in love and live happily ever after. Sara Fielding is a novelist from the country, come to London to do research on gambling halls for her next book. Although she is very proper and sheltered, she is also adventurous and open-minded. Derek Craven was a boy from the streets who pulled himself up by his bootstraps to become a fabulously wealthy, gambling establishment owner.
When Sara saves Derek when he is attacked in an alley, she begins to use his club for her research and sparks begin to fly. They must overcome obstacles: Derek's jealous ex-lover, Derek's inability to love, and Sara's fiance back home, and it is all very romantic. Derek saves Sara a number of times and can't resist himself. There is also a glimpse of another couple (Lucy and Alex) who are somewhat involved in Derek's life. I'm mainly mentioning this because I found Lucy and Alex interesting enough to pick up their book and read it next.
Some of this plot was predictably ridiculous, but because Kleypas did pretty well with the emotions and kept the story interesting, it didn't bother me while I was reading it. It was a good one.