All About That Duke by Merry Farmer

Lady Chloe O’Shea lives life with her head in the clouds—or rather the stars. As a budding astrologer, she thinks the course of the world and her life is written in the stars, and if she just looks hard enough, she can see where the future will take her. But the last thing she saw coming was a handsome duke with a secret.
Deane Crenshaw, the Duke of Blackburn, is in Ireland looking for a bride after an embarrassing scandal that has turned all of the eligible English maidens against him. He’s gained a reputation as a rogue and a rake, and as a result, all the marriage-minded ladies of Ireland can talk about is “that duke”.
All except for Chloe, who sees Deane for who he truly is (a Scorpio, of course, which explains everything). Finally, Deane feels as though someone truly understands him and likes him for himself and not his title. But can he keep up with Chloe’s wild ways and wilder way of seeing the world, or will she ruin his already shattered reputation even further?