LPC Free Books has several FREE suggestions. They both showed up in 2019 and they are on my read and enjoyed list.
Hidden Things (Faded Photographs Book 2)

Kylie had her life all planned out—with marriage to Matthew and a “happily-ever-after” in their sleepy Wisconsin hometown. But when she opens a wedding invitation and a decades-old faded photograph falls out, she uncovers a side of her mother Kylie never suspected.
As she digs into the past, Kylie uncovers a whole world of hidden surprises, including grandparents she never knew existed. Suddenly, Kylie faces a choice between two worlds—and doesn’t feel she fits in either. As the past changes, so does her future with Matthew.
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A Place Called Morning

Mae Demaray retreats from life after her young grandson dies accidentally while under her care.
What was once a quiet life in an old clapboard house on a quiet Minneapolis street, rich with the hues of security and love, is now shattered. But a decades-old family secret, based on an unlikely friendship over the years, brings redemption and restoration once it is revealed.
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1531 Entertainment has a bargain mystery for us. I’ve read and enjoyed this book too.
Threads of Suspicion (An Evie Blackwell Cold Case)

Evie Blackwell’s reputation as a top investigator for the Illinois State Police has landed her an appointment to the governor’s new Missing Persons Task Force. This elite investigative team is launched with plenty of public fanfare. The governor has made this initiative a high priority, so they will have to produce results–and quickly.
Evie and her new partner, David Marshal, are assigned to a pair of unrelated cases in suburban Chicago, and while both involve persons now missing for several years, the cases couldn’t be more different. While Evie opens old wounds in a close-knit neighborhood to find a missing college student, David searches for a private investigator working for a high-powered client.
With a deep conviction that “justice for all” truly matters, Evie and David are unrelenting in their search for the truth. But Evie must also find answers to the questions that lie just beneath the surface in her personal life.
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Happy Reading y’all