Now, Sarah may know precisely which ones she wants to offer her husband, but I'm seriously mulling over this question. But I now have a number of very smart romance fans reading this blog, so I might as well take advantage of your collective brilliance and creativity.
Let me tell you something of Ross's habits, interests and current reading preferences. He is a crossword expert (you can read a bio here) and posts daily at his blog about the New York Times crossword. He is big fan of Charles Dickens, Evelyn Waugh, Julian Barnes, P.G. Wodehouse, and the Sherlock Holmes stories. He's read Douglas Adams' Hitchhiker's Guide books, but not Terry Pratchett's Discworld oeuvre (from which, I believe, you're supposed to deduce that he likes humor, can tolerate some sci fi futurism, but doesn't do fantasy). He won't read the Harry Potter books, primarily because Ross had to attend a boarding preparatory school from age 7 and a public school from age 13; he has no interest in any fictional boarding school, and the fantasy element doesn't help.
Here's my thinking so far: Because he's actually trying to learn about American football and baseball, It Had to Be You, the first of the Susan Elizabeth Philips Chicago Stars books. It's not her best from a romance point of view, but it's funny and there's more actual football in it. And, because he's English, the fact that the football is a bit, uh, fictionalized shouldn't be a problem. (On the other hand, he might enjoy Dream a Little Dream, which is my favorite from that series, because it has Edward, and Ross is a sucker for cute, weird kids...)
Next, a Pat Gaffney -- maybe To Have and To Hold? (I personally prefer To Love and To Cherish, but Ross is pretty anti-Church of England, so would Christy bother him?) She was inspired by mid-19th century novels, although the rural setting is so different from Dickens' London, I'm not sure that would trigger his interests.
A LaVyrle Spencer? I've only reread Morning Glory recently, but I could hastily reread others of hers before offering them to Ross. Similarly, he suggests Georgette Heyer, which is fine but which one? I haven't reread any of hers other than These Old Shades and Devil's Cub, so I'd better get reading!
After that, I don't know. A Jennifer Crusie? (He likes humorous books -- both fiction and non-fiction. He loves Bill Bryson, for example, and was a Garrison Keillor fan long before he came to the US.) I liked the con artist family in Temptation, Ohio, but are there others?
Which is all I've thought of so far. Help me out, Romlandia -- suggest some books that a nice British chap would enjoy!