"Werewolves, witches and vamps star in this light regency era paranormal romance series and its two follow on spin offs A Certain Wolfish Charm Tall Dark and Wolfish The Wolf Next Door Taming of the Wolf
It Happened One Bite Never Been Bit In the Heat of the Bite
"The males of the Wulff family suffer from a curse which is triggered when they fall in love, but love also offers the cure (a different cure for each brother) I believe that these were regency era too.
Midnight Pleasures "A Wulff's Curse" The Dark One The Untamed One Love at First Bite "The Forgotten One" The Cursed One"
"This one has 8 or so cursed Viking warriors - the curse forces them to spend half their lives (some day, some night) as animals. The fun part of the series is the books are advancing through time as each warrior finds love and an end to his curse. Immortal Warrior Immortal Champion Immortal Outlaw Immortal Defender"