The Perfect Bride is the 8th book in Brenda Joyce's deWarenne Dynasty. It features Rex deWarrenne, the last of the deWarenne siblings. The other deWarennes were featured in the previous novels in the series.
Rex de Warenne lost a leg in the Napoleonic wars and has been pretty much drunk in isolated Cornwall ever since. Well, he's managed to find time to have scandalous affairs with house maids.
Lady Blanche Harrington is the perfect daughter and the perfect hostess. She's successfully avoided marriage until age 28. But now that her father has died, she needs a husband to run her vast estate. Oh, she's also sufferring from a delayed form of post traumatic stress disorder due to witnessing her mother's murder when she was a small child. Except they didn't have PTSD in the 1800's, so she thinks she's going insane.
People in romance novels sure do have to suffer a lot to get their happily ever after.