Duke in Search of a Duchess by Jennifer Ashley

The meticulous Duke of Ashford is dismayed when his children inform him they’ve asked the young widow next door to find him a new wife. Ash can’t think of a more appalling assistant than Helena Courtland, gossipy busybody he steadfastly avoids. But Helena sweeps into his home and his life before he can stop her, turning Ash’s precisely ordered world into a chaotic whirlwind, and stealing his heart.