Englefield Series by Isabel Cooper

When a half-naked woman suddenly appears on his country estate, Simon Grenville doesn't have time to be shocked. Demonic beasts are hot on his heels until the beautiful stranger unsheathes several knives strapped to her skin-tight trousers and kills them. As he stares at her fierce, heart-stopping face, Simon knows he's in a hell of a lot of trouble...Joan is from a time where demons run rampant and humanity is fighting for its existence... moreWhen a half-naked woman suddenly appears on his country estate, Simon Grenville doesn't have time to be shocked. Demonic beasts are hot on his heels until the beautiful stranger unsheathes several knives strapped to her skin-tight trousers and kills them. As he stares at her fierce, heart-stopping face, Simon knows he's in a hell of a lot of trouble...Joan is from a time where demons run rampant and humanity is fighting for its existence. To prevent this terrible future, she is sent back to Victorian England to kill the magician responsible for unleashing the dark forces. But Joan is a soldier more used to sparring than dancing. To get close to her target, she'll need Simon to teach her how to fit into polite society. Joan doesn't mind practicing proper flirtation on Simon, but she can't allow herself to be distracted by his gentle hands or devilish smile--the very future depends on it. less

For years, Gareth St. John put his supernatural talent for healing in service to the British Army. Now he's the doctor at a very unusual new school that helps people with special "talents" learn how to hone their abilities.Olivia Brightmore became a fake medium to support herself after her husband died, but she never expected to discover real magic as the school's newest teacher. Olivia tries to keep the handsome doctor at arm's length, but she can't resist the urge to get under his skin... moreFor years, Gareth St. John put his supernatural talent for healing in service to the British Army. Now he's the doctor at a very unusual new school that helps people with special "talents" learn how to hone their abilities.Olivia Brightmore became a fake medium to support herself after her husband died, but she never expected to discover real magic as the school's newest teacher. Olivia tries to keep the handsome doctor at arm's length, but she can't resist the urge to get under his skin. He's no proper gentleman, but she's No Honest Woman. less