Start with high-confidence later-life romance books, then narrow by subgenre or adjacent topics.
The Arctic Cruise
Caroline James
A Certain Age
Beatriz Williams
Little Wishes
Michelle Adams, Joan Walker
Not Even If You Begged
Francis Ray
The Hand I Fan With
Tina Mcelroy Ansa
Something Borrowed
Alexandra Marshall
Flirting With Forty
Jane Porter
Flirting With Fifty
The Road to Tender Hearts
Annie Hartnett
A Private View
Anita Brookner
Never Change
Elizabeth Berg, Brilliance Audio
Ms. V's Hot Girl Summer
A.H. Cunningham
Comeback Love
Peter Golden
Becoming Ted
Matt Cain
RV There Yet?
Diann Hunt
For Better or for Worse
Betty's (little Basement) Garden
Laurel Dewey
Go Gentle: Oprah's Book Club
Maria Semple