Breath of Magic (Lennox Family Magic, #1)

Precocious Puritan and aspiring witch Arian Whitewood spends her lonely nights dreaming of magic and excitement. She gets more excitement than she bargains for when she crash lands straight out of a witch hunt into the 20th century and the arms of Tristan Lennox, a reclusive billionaire. Arian blows through Tristan's climate-controlled existence like a breath of magic, only to discover that the spell he weaves around her heart is more compelling than any enchantment.