His Suitable Amish Wife by Rebecca Kertz

When Ellie Stoltzfus arrives to provide housecleaning and child-care services for her friend's brother, Reuben Miller, the Amish widower is reluctant to agree. But, smitten with Reuben's young son, Ellie is determined to see the job through. There's no denying Ellie is good for both father and son, but still-grieving Reuben won't marry for love again. Can he convince Ellie to be his wife...in name only?

Amish Covert Operation by Meghan Carver

After Amish widow Katie Schwartz's search for her reclusive brother results in a shooting and her finding a cryptic message, she must rely on federal agent Adam Troyer to shield her. But, undercover as a Plain man, can Adam save her brother's life and protect Katie? Trusting the handsome Englisch agent is already dangerous...but falling for him could risk everything Katie holds dear.